[chore] update direct Go dependencies (#4162)

- update gruf/go-stroage v0.2.0 -> v0.2.1
- update KimMachineGun/automemlimit v0.7.1 -> v0.7.2
- update miekg/dns v1.1.65 -> v1.1.66
- update ncruces/go-sqlite3 v0.25.1 -> v0.25.2
- update spf13/cast v1.7.1 -> v1.8.0
- update tdewolff/minify/v2 v2.23.1 -> v2.23.5
- update x/crypto v0.37.0 -> v0.38.0
- update x/image v0.26.0 -> v0.27.0
- update x/net v0.39.0 -> v0.40.0
- update x/oauth2 v0.29.0 -> v0.30.0
- update x/sys v0.32.0 -> v0.33.0
- update x/text v0.24.0 -> v0.25.0

Reviewed-on: https://codeberg.org/superseriousbusiness/gotosocial/pulls/4162
Co-authored-by: kim <grufwub@gmail.com>
Co-committed-by: kim <grufwub@gmail.com>

8 files changed, 79 insertions, 88 deletions

diff --git a/vendor/golang.org/x/oauth2/internal/doc.go b/vendor/golang.org/x/oauth2/internal/doc.go
index 03265e888..8c7c475f2 100644
--- a/vendor/golang.org/x/oauth2/internal/doc.go
+++ b/vendor/golang.org/x/oauth2/internal/doc.go
@@ -2,5 +2,5 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// Package internal contains support packages for oauth2 package.
+// Package internal contains support packages for [golang.org/x/oauth2].
 package internal
diff --git a/vendor/golang.org/x/oauth2/internal/oauth2.go b/vendor/golang.org/x/oauth2/internal/oauth2.go
index 14989beaf..71ea6ad1f 100644
--- a/vendor/golang.org/x/oauth2/internal/oauth2.go
+++ b/vendor/golang.org/x/oauth2/internal/oauth2.go
@@ -13,7 +13,7 @@ import (
 )
 
 // ParseKey converts the binary contents of a private key file
-// to an *rsa.PrivateKey. It detects whether the private key is in a
+// to an [*rsa.PrivateKey]. It detects whether the private key is in a
 // PEM container or not. If so, it extracts the private key
 // from PEM container before conversion. It only supports PEM
 // containers with no passphrase.
diff --git a/vendor/golang.org/x/oauth2/internal/token.go b/vendor/golang.org/x/oauth2/internal/token.go
index e83ddeef0..8389f2462 100644
--- a/vendor/golang.org/x/oauth2/internal/token.go
+++ b/vendor/golang.org/x/oauth2/internal/token.go
@@ -10,7 +10,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"math"
 	"mime"
 	"net/http"
@@ -26,9 +25,9 @@ import (
 // the requests to access protected resources on the OAuth 2.0
 // provider's backend.
 //
-// This type is a mirror of oauth2.Token and exists to break
+// This type is a mirror of [golang.org/x/oauth2.Token] and exists to break
 // an otherwise-circular dependency. Other internal packages
-// should convert this Token into an oauth2.Token before use.
+// should convert this Token into an [golang.org/x/oauth2.Token] before use.
 type Token struct {
 	// AccessToken is the token that authorizes and authenticates
 	// the requests.
@@ -50,9 +49,16 @@ type Token struct {
 	// mechanisms for that TokenSource will not be used.
 	Expiry time.Time
 
+	// ExpiresIn is the OAuth2 wire format "expires_in" field,
+	// which specifies how many seconds later the token expires,
+	// relative to an unknown time base approximately around "now".
+	// It is the application's responsibility to populate
+	// `Expiry` from `ExpiresIn` when required.
+	ExpiresIn int64 `json:"expires_in,omitempty"`
+
 	// Raw optionally contains extra metadata from the server
 	// when updating a token.
-	Raw interface{}
+	Raw any
 }
 
 // tokenJSON is the struct representing the HTTP response from OAuth2
@@ -99,14 +105,6 @@ func (e *expirationTime) UnmarshalJSON(b []byte) error {
 	return nil
 }
 
-// RegisterBrokenAuthHeaderProvider previously did something. It is now a no-op.
-//
-// Deprecated: this function no longer does anything. Caller code that
-// wants to avoid potential extra HTTP requests made during
-// auto-probing of the provider's auth style should set
-// Endpoint.AuthStyle.
-func RegisterBrokenAuthHeaderProvider(tokenURL string) {}
-
 // AuthStyle is a copy of the golang.org/x/oauth2 package's AuthStyle type.
 type AuthStyle int
 
@@ -143,6 +141,11 @@ func (lc *LazyAuthStyleCache) Get() *AuthStyleCache {
 	return c
 }
 
+type authStyleCacheKey struct {
+	url      string
+	clientID string
+}
+
 // AuthStyleCache is the set of tokenURLs we've successfully used via
 // RetrieveToken and which style auth we ended up using.
 // It's called a cache, but it doesn't (yet?) shrink. It's expected that
@@ -150,26 +153,26 @@ func (lc *LazyAuthStyleCache) Get() *AuthStyleCache {
 // small.
 type AuthStyleCache struct {
 	mu sync.Mutex
-	m  map[string]AuthStyle // keyed by tokenURL
+	m  map[authStyleCacheKey]AuthStyle
 }
 
 // lookupAuthStyle reports which auth style we last used with tokenURL
 // when calling RetrieveToken and whether we have ever done so.
-func (c *AuthStyleCache) lookupAuthStyle(tokenURL string) (style AuthStyle, ok bool) {
+func (c *AuthStyleCache) lookupAuthStyle(tokenURL, clientID string) (style AuthStyle, ok bool) {
 	c.mu.Lock()
 	defer c.mu.Unlock()
-	style, ok = c.m[tokenURL]
+	style, ok = c.m[authStyleCacheKey{tokenURL, clientID}]
 	return
 }
 
 // setAuthStyle adds an entry to authStyleCache, documented above.
-func (c *AuthStyleCache) setAuthStyle(tokenURL string, v AuthStyle) {
+func (c *AuthStyleCache) setAuthStyle(tokenURL, clientID string, v AuthStyle) {
 	c.mu.Lock()
 	defer c.mu.Unlock()
 	if c.m == nil {
-		c.m = make(map[string]AuthStyle)
+		c.m = make(map[authStyleCacheKey]AuthStyle)
 	}
-	c.m[tokenURL] = v
+	c.m[authStyleCacheKey{tokenURL, clientID}] = v
 }
 
 // newTokenRequest returns a new *http.Request to retrieve a new token
@@ -210,9 +213,9 @@ func cloneURLValues(v url.Values) url.Values {
 }
 
 func RetrieveToken(ctx context.Context, clientID, clientSecret, tokenURL string, v url.Values, authStyle AuthStyle, styleCache *AuthStyleCache) (*Token, error) {
-	needsAuthStyleProbe := authStyle == 0
+	needsAuthStyleProbe := authStyle == AuthStyleUnknown
 	if needsAuthStyleProbe {
-		if style, ok := styleCache.lookupAuthStyle(tokenURL); ok {
+		if style, ok := styleCache.lookupAuthStyle(tokenURL, clientID); ok {
 			authStyle = style
 			needsAuthStyleProbe = false
 		} else {
@@ -242,7 +245,7 @@ func RetrieveToken(ctx context.Context, clientID, clientSecret, tokenURL string,
 		token, err = doTokenRoundTrip(ctx, req)
 	}
 	if needsAuthStyleProbe && err == nil {
-		styleCache.setAuthStyle(tokenURL, authStyle)
+		styleCache.setAuthStyle(tokenURL, clientID, authStyle)
 	}
 	// Don't overwrite `RefreshToken` with an empty value
 	// if this was a token refreshing request.
@@ -257,7 +260,7 @@ func doTokenRoundTrip(ctx context.Context, req *http.Request) (*Token, error) {
 	if err != nil {
 		return nil, err
 	}
-	body, err := ioutil.ReadAll(io.LimitReader(r.Body, 1<<20))
+	body, err := io.ReadAll(io.LimitReader(r.Body, 1<<20))
 	r.Body.Close()
 	if err != nil {
 		return nil, fmt.Errorf("oauth2: cannot fetch token: %v", err)
@@ -312,7 +315,8 @@ func doTokenRoundTrip(ctx context.Context, req *http.Request) (*Token, error) {
 			TokenType:    tj.TokenType,
 			RefreshToken: tj.RefreshToken,
 			Expiry:       tj.expiry(),
-			Raw:          make(map[string]interface{}),
+			ExpiresIn:    int64(tj.ExpiresIn),
+			Raw:          make(map[string]any),
 		}
 		json.Unmarshal(body, &token.Raw) // no error checks for optional fields
 	}
diff --git a/vendor/golang.org/x/oauth2/internal/transport.go b/vendor/golang.org/x/oauth2/internal/transport.go
index b9db01ddf..afc0aeb27 100644
--- a/vendor/golang.org/x/oauth2/internal/transport.go
+++ b/vendor/golang.org/x/oauth2/internal/transport.go
@@ -9,8 +9,8 @@ import (
 	"net/http"
 )
 
-// HTTPClient is the context key to use with golang.org/x/net/context's
-// WithValue function to associate an *http.Client value with a context.
+// HTTPClient is the context key to use with [context.WithValue]
+// to associate an [*http.Client] value with a context.
 var HTTPClient ContextKey
 
 // ContextKey is just an empty struct. It exists so HTTPClient can be
diff --git a/vendor/golang.org/x/oauth2/oauth2.go b/vendor/golang.org/x/oauth2/oauth2.go
index eacdd7fd9..de34feb84 100644
--- a/vendor/golang.org/x/oauth2/oauth2.go
+++ b/vendor/golang.org/x/oauth2/oauth2.go
@@ -22,9 +22,9 @@ import (
 )
 
 // NoContext is the default context you should supply if not using
-// your own context.Context (see https://golang.org/x/net/context).
+// your own [context.Context].
 //
-// Deprecated: Use context.Background() or context.TODO() instead.
+// Deprecated: Use [context.Background] or [context.TODO] instead.
 var NoContext = context.TODO()
 
 // RegisterBrokenAuthHeaderProvider previously did something. It is now a no-op.
@@ -37,8 +37,8 @@ func RegisterBrokenAuthHeaderProvider(tokenURL string) {}
 
 // Config describes a typical 3-legged OAuth2 flow, with both the
 // client application information and the server's endpoint URLs.
-// For the client credentials 2-legged OAuth2 flow, see the clientcredentials
-// package (https://golang.org/x/oauth2/clientcredentials).
+// For the client credentials 2-legged OAuth2 flow, see the
+// [golang.org/x/oauth2/clientcredentials] package.
 type Config struct {
 	// ClientID is the application's ID.
 	ClientID string
@@ -46,7 +46,7 @@ type Config struct {
 	// ClientSecret is the application's secret.
 	ClientSecret string
 
-	// Endpoint contains the resource server's token endpoint
+	// Endpoint contains the authorization server's token endpoint
 	// URLs. These are constants specific to each server and are
 	// often available via site-specific packages, such as
 	// google.Endpoint or github.Endpoint.
@@ -135,7 +135,7 @@ type setParam struct{ k, v string }
 
 func (p setParam) setValue(m url.Values) { m.Set(p.k, p.v) }
 
-// SetAuthURLParam builds an AuthCodeOption which passes key/value parameters
+// SetAuthURLParam builds an [AuthCodeOption] which passes key/value parameters
 // to a provider's authorization endpoint.
 func SetAuthURLParam(key, value string) AuthCodeOption {
 	return setParam{key, value}
@@ -148,8 +148,8 @@ func SetAuthURLParam(key, value string) AuthCodeOption {
 // request and callback. The authorization server includes this value when
 // redirecting the user agent back to the client.
 //
-// Opts may include AccessTypeOnline or AccessTypeOffline, as well
-// as ApprovalForce.
+// Opts may include [AccessTypeOnline] or [AccessTypeOffline], as well
+// as [ApprovalForce].
 //
 // To protect against CSRF attacks, opts should include a PKCE challenge
 // (S256ChallengeOption). Not all servers support PKCE. An alternative is to
@@ -194,7 +194,7 @@ func (c *Config) AuthCodeURL(state string, opts ...AuthCodeOption) string {
 // and when other authorization grant types are not available."
 // See https://tools.ietf.org/html/rfc6749#section-4.3 for more info.
 //
-// The provided context optionally controls which HTTP client is used. See the HTTPClient variable.
+// The provided context optionally controls which HTTP client is used. See the [HTTPClient] variable.
 func (c *Config) PasswordCredentialsToken(ctx context.Context, username, password string) (*Token, error) {
 	v := url.Values{
 		"grant_type": {"password"},
@@ -212,10 +212,10 @@ func (c *Config) PasswordCredentialsToken(ctx context.Context, username, passwor
 // It is used after a resource provider redirects the user back
 // to the Redirect URI (the URL obtained from AuthCodeURL).
 //
-// The provided context optionally controls which HTTP client is used. See the HTTPClient variable.
+// The provided context optionally controls which HTTP client is used. See the [HTTPClient] variable.
 //
-// The code will be in the *http.Request.FormValue("code"). Before
-// calling Exchange, be sure to validate FormValue("state") if you are
+// The code will be in the [http.Request.FormValue]("code"). Before
+// calling Exchange, be sure to validate [http.Request.FormValue]("state") if you are
 // using it to protect against CSRF attacks.
 //
 // If using PKCE to protect against CSRF attacks, opts should include a
@@ -242,10 +242,10 @@ func (c *Config) Client(ctx context.Context, t *Token) *http.Client {
 	return NewClient(ctx, c.TokenSource(ctx, t))
 }
 
-// TokenSource returns a TokenSource that returns t until t expires,
+// TokenSource returns a [TokenSource] that returns t until t expires,
 // automatically refreshing it as necessary using the provided context.
 //
-// Most users will use Config.Client instead.
+// Most users will use [Config.Client] instead.
 func (c *Config) TokenSource(ctx context.Context, t *Token) TokenSource {
 	tkr := &tokenRefresher{
 		ctx:  ctx,
@@ -260,7 +260,7 @@ func (c *Config) TokenSource(ctx context.Context, t *Token) TokenSource {
 	}
 }
 
-// tokenRefresher is a TokenSource that makes "grant_type"=="refresh_token"
+// tokenRefresher is a TokenSource that makes "grant_type=refresh_token"
 // HTTP requests to renew a token using a RefreshToken.
 type tokenRefresher struct {
 	ctx          context.Context // used to get HTTP requests
@@ -305,8 +305,7 @@ type reuseTokenSource struct {
 }
 
 // Token returns the current token if it's still valid, else will
-// refresh the current token (using r.Context for HTTP client
-// information) and return the new one.
+// refresh the current token and return the new one.
 func (s *reuseTokenSource) Token() (*Token, error) {
 	s.mu.Lock()
 	defer s.mu.Unlock()
@@ -322,7 +321,7 @@ func (s *reuseTokenSource) Token() (*Token, error) {
 	return t, nil
 }
 
-// StaticTokenSource returns a TokenSource that always returns the same token.
+// StaticTokenSource returns a [TokenSource] that always returns the same token.
 // Because the provided token t is never refreshed, StaticTokenSource is only
 // useful for tokens that never expire.
 func StaticTokenSource(t *Token) TokenSource {
@@ -338,16 +337,16 @@ func (s staticTokenSource) Token() (*Token, error) {
 	return s.t, nil
 }
 
-// HTTPClient is the context key to use with golang.org/x/net/context's
-// WithValue function to associate an *http.Client value with a context.
+// HTTPClient is the context key to use with [context.WithValue]
+// to associate a [*http.Client] value with a context.
 var HTTPClient internal.ContextKey
 
-// NewClient creates an *http.Client from a Context and TokenSource.
+// NewClient creates an [*http.Client] from a [context.Context] and [TokenSource].
 // The returned client is not valid beyond the lifetime of the context.
 //
-// Note that if a custom *http.Client is provided via the Context it
+// Note that if a custom [*http.Client] is provided via the [context.Context] it
 // is used only for token acquisition and is not used to configure the
-// *http.Client returned from NewClient.
+// [*http.Client] returned from NewClient.
 //
 // As a special case, if src is nil, a non-OAuth2 client is returned
 // using the provided context. This exists to support related OAuth2
@@ -368,7 +367,7 @@ func NewClient(ctx context.Context, src TokenSource) *http.Client {
 	}
 }
 
-// ReuseTokenSource returns a TokenSource which repeatedly returns the
+// ReuseTokenSource returns a [TokenSource] which repeatedly returns the
 // same token as long as it's valid, starting with t.
 // When its cached token is invalid, a new token is obtained from src.
 //
@@ -376,10 +375,10 @@ func NewClient(ctx context.Context, src TokenSource) *http.Client {
 // (such as a file on disk) between runs of a program, rather than
 // obtaining new tokens unnecessarily.
 //
-// The initial token t may be nil, in which case the TokenSource is
+// The initial token t may be nil, in which case the [TokenSource] is
 // wrapped in a caching version if it isn't one already. This also
 // means it's always safe to wrap ReuseTokenSource around any other
-// TokenSource without adverse effects.
+// [TokenSource] without adverse effects.
 func ReuseTokenSource(t *Token, src TokenSource) TokenSource {
 	// Don't wrap a reuseTokenSource in itself. That would work,
 	// but cause an unnecessary number of mutex operations.
@@ -397,8 +396,8 @@ func ReuseTokenSource(t *Token, src TokenSource) TokenSource {
 	}
 }
 
-// ReuseTokenSourceWithExpiry returns a TokenSource that acts in the same manner as the
-// TokenSource returned by ReuseTokenSource, except the expiry buffer is
+// ReuseTokenSourceWithExpiry returns a [TokenSource] that acts in the same manner as the
+// [TokenSource] returned by [ReuseTokenSource], except the expiry buffer is
 // configurable. The expiration time of a token is calculated as
 // t.Expiry.Add(-earlyExpiry).
 func ReuseTokenSourceWithExpiry(t *Token, src TokenSource, earlyExpiry time.Duration) TokenSource {
diff --git a/vendor/golang.org/x/oauth2/pkce.go b/vendor/golang.org/x/oauth2/pkce.go
index 6a95da975..cea8374d5 100644
--- a/vendor/golang.org/x/oauth2/pkce.go
+++ b/vendor/golang.org/x/oauth2/pkce.go
@@ -1,6 +1,7 @@
 // Copyright 2023 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
+
 package oauth2
 
 import (
@@ -20,9 +21,9 @@ const (
 // This follows recommendations in RFC 7636.
 //
 // A fresh verifier should be generated for each authorization.
-// S256ChallengeOption(verifier) should then be passed to Config.AuthCodeURL
-// (or Config.DeviceAuth) and VerifierOption(verifier) to Config.Exchange
-// (or Config.DeviceAccessToken).
+// The resulting verifier should be passed to [Config.AuthCodeURL] or [Config.DeviceAuth]
+// with [S256ChallengeOption], and to [Config.Exchange] or [Config.DeviceAccessToken]
+// with [VerifierOption].
 func GenerateVerifier() string {
 	// "RECOMMENDED that the output of a suitable random number generator be
 	// used to create a 32-octet sequence.  The octet sequence is then
@@ -36,22 +37,22 @@ func GenerateVerifier() string {
 	return base64.RawURLEncoding.EncodeToString(data)
 }
 
-// VerifierOption returns a PKCE code verifier AuthCodeOption. It should be
-// passed to Config.Exchange or Config.DeviceAccessToken only.
+// VerifierOption returns a PKCE code verifier [AuthCodeOption]. It should only be
+// passed to [Config.Exchange] or [Config.DeviceAccessToken].
 func VerifierOption(verifier string) AuthCodeOption {
 	return setParam{k: codeVerifierKey, v: verifier}
 }
 
 // S256ChallengeFromVerifier returns a PKCE code challenge derived from verifier with method S256.
 //
-// Prefer to use S256ChallengeOption where possible.
+// Prefer to use [S256ChallengeOption] where possible.
 func S256ChallengeFromVerifier(verifier string) string {
 	sha := sha256.Sum256([]byte(verifier))
 	return base64.RawURLEncoding.EncodeToString(sha[:])
 }
 
 // S256ChallengeOption derives a PKCE code challenge derived from verifier with
-// method S256. It should be passed to Config.AuthCodeURL or Config.DeviceAuth
+// method S256. It should be passed to [Config.AuthCodeURL] or [Config.DeviceAuth]
 // only.
 func S256ChallengeOption(verifier string) AuthCodeOption {
 	return challengeOption{
diff --git a/vendor/golang.org/x/oauth2/token.go b/vendor/golang.org/x/oauth2/token.go
index 8c31136c4..239ec3296 100644
--- a/vendor/golang.org/x/oauth2/token.go
+++ b/vendor/golang.org/x/oauth2/token.go
@@ -44,7 +44,7 @@ type Token struct {
 
 	// Expiry is the optional expiration time of the access token.
 	//
-	// If zero, TokenSource implementations will reuse the same
+	// If zero, [TokenSource] implementations will reuse the same
 	// token forever and RefreshToken or equivalent
 	// mechanisms for that TokenSource will not be used.
 	Expiry time.Time `json:"expiry,omitempty"`
@@ -58,7 +58,7 @@ type Token struct {
 
 	// raw optionally contains extra metadata from the server
 	// when updating a token.
-	raw interface{}
+	raw any
 
 	// expiryDelta is used to calculate when a token is considered
 	// expired, by subtracting from Expiry. If zero, defaultExpiryDelta
@@ -86,16 +86,16 @@ func (t *Token) Type() string {
 // SetAuthHeader sets the Authorization header to r using the access
 // token in t.
 //
-// This method is unnecessary when using Transport or an HTTP Client
+// This method is unnecessary when using [Transport] or an HTTP Client
 // returned by this package.
 func (t *Token) SetAuthHeader(r *http.Request) {
 	r.Header.Set("Authorization", t.Type()+" "+t.AccessToken)
 }
 
-// WithExtra returns a new Token that's a clone of t, but using the
+// WithExtra returns a new [Token] that's a clone of t, but using the
 // provided raw extra map. This is only intended for use by packages
 // implementing derivative OAuth2 flows.
-func (t *Token) WithExtra(extra interface{}) *Token {
+func (t *Token) WithExtra(extra any) *Token {
 	t2 := new(Token)
 	*t2 = *t
 	t2.raw = extra
@@ -105,8 +105,8 @@ func (t *Token) WithExtra(extra interface{}) *Token {
 // Extra returns an extra field.
 // Extra fields are key-value pairs returned by the server as a
 // part of the token retrieval response.
-func (t *Token) Extra(key string) interface{} {
-	if raw, ok := t.raw.(map[string]interface{}); ok {
+func (t *Token) Extra(key string) any {
+	if raw, ok := t.raw.(map[string]any); ok {
 		return raw[key]
 	}
 
@@ -163,6 +163,7 @@ func tokenFromInternal(t *internal.Token) *Token {
 		TokenType:    t.TokenType,
 		RefreshToken: t.RefreshToken,
 		Expiry:       t.Expiry,
+		ExpiresIn:    t.ExpiresIn,
 		raw:          t.Raw,
 	}
 }
diff --git a/vendor/golang.org/x/oauth2/transport.go b/vendor/golang.org/x/oauth2/transport.go
index 90657915f..8bbebbac9 100644
--- a/vendor/golang.org/x/oauth2/transport.go
+++ b/vendor/golang.org/x/oauth2/transport.go
@@ -11,12 +11,12 @@ import (
 	"sync"
 )
 
-// Transport is an http.RoundTripper that makes OAuth 2.0 HTTP requests,
-// wrapping a base RoundTripper and adding an Authorization header
-// with a token from the supplied Sources.
+// Transport is an [http.RoundTripper] that makes OAuth 2.0 HTTP requests,
+// wrapping a base [http.RoundTripper] and adding an Authorization header
+// with a token from the supplied [TokenSource].
 //
 // Transport is a low-level mechanism. Most code will use the
-// higher-level Config.Client method instead.
+// higher-level [Config.Client] method instead.
 type Transport struct {
 	// Source supplies the token to add to outgoing requests'
 	// Authorization headers.
@@ -47,7 +47,7 @@ func (t *Transport) RoundTrip(req *http.Request) (*http.Response, error) {
 		return nil, err
 	}
 
-	req2 := cloneRequest(req) // per RoundTripper contract
+	req2 := req.Clone(req.Context())
 	token.SetAuthHeader(req2)
 
 	// req.Body is assumed to be closed by the base RoundTripper.
@@ -73,17 +73,3 @@ func (t *Transport) base() http.RoundTripper {
 	}
 	return http.DefaultTransport
 }
-
-// cloneRequest returns a clone of the provided *http.Request.
-// The clone is a shallow copy of the struct and its Header map.
-func cloneRequest(r *http.Request) *http.Request {
-	// shallow copy of the struct
-	r2 := new(http.Request)
-	*r2 = *r
-	// deep copy of the Header
-	r2.Header = make(http.Header, len(r.Header))
-	for k, s := range r.Header {
-		r2.Header[k] = append([]string(nil), s...)
-	}
-	return r2
-}