[bugfix] Align default values in the configuration file with the code (#1971)

* Set default value of SMTPFrom to empty string

This parameter should contain proper e-mail address (to be provided by user during configuration).

* Update default values in example/config.yaml

Default values and related comments in example/config.yaml are aligned
with values defined in internal/config/defaults.go.
Small improvements to foramting of config.yaml file.

* Add default value for AdvancedThrottlingRetryAfter to internal/config/defaults.go

AdvancedThrottlingRetryAfter was introduced in 70739d3 (superseriousbusiness/gotosocial#1466).

* Update config.yaml snippets in documentation

11 files changed, 55 insertions, 32 deletions

diff --git a/docs/configuration/advanced.md b/docs/configuration/advanced.md
index 6bf57f869..07e3376d5 100644
--- a/docs/configuration/advanced.md
+++ b/docs/configuration/advanced.md
@@ -53,7 +53,7 @@ advanced-cookies-samesite: "lax"
 advanced-rate-limit-requests: 300
 
 # Int. Amount of open requests to permit per CPU, per router grouping, before applying http
-# request throttling. Any requests beyond the calculated limit are held in a backlog queue for 
+# request throttling. Any requests beyond the calculated limit are held in a backlog queue for
 # up to 30 seconds before either being processed or timing out. Requests that don't fit in the backlog
 # queue will have status 503 returned to them, and the header 'Retry-After' will be set to 30 seconds.
 #
@@ -71,7 +71,7 @@ advanced-rate-limit-requests: 300
 # 2 cpu = 08 open, 032 backlog
 # 4 cpu = 16 open, 064 backlog
 #
-# A multiplier of 8 is a sensible default, but you may wish to increase this for instances 
+# A multiplier of 8 is a sensible default, but you may wish to increase this for instances
 # running on very performant hardware, or decrease it for instances using v. slow CPUs.
 #
 # If you set this to 0 or less, http request throttling will be disabled entirely.
@@ -80,6 +80,13 @@ advanced-rate-limit-requests: 300
 # Default: 8
 advanced-throttling-multiplier: 8
 
+# Duration. Time period to use as the "retry-after" header value in response to throttled requests.
+# Minimum resolution is 1 second.
+#
+# Examples: [30s, 10s, 5s, 1m]
+# Default: "30s"
+advanced-throttling-retry-after: "30s"
+
 # Int. CPU multiplier for the amount of goroutines to spawn in order to send messages via ActivityPub.
 # Messages will be batched so that at most multiplier * CPU count messages will be sent out at once.
 # This can be tuned to limit concurrent POSTing to remote inboxes, preventing your instance CPU
diff --git a/docs/configuration/database.md b/docs/configuration/database.md
index 047b8c198..3e66b09fc 100644
--- a/docs/configuration/database.md
+++ b/docs/configuration/database.md
@@ -165,6 +165,6 @@ db-sqlite-cache-size: "8MiB"
 # If set to empty string or zero, the sqlite default will be used.
 # See: https://www.sqlite.org/pragma.html#pragma_busy_timeout
 # Examples: ["0s", "1s", "30s", "1m", "5m"]
-# Default: "5s"
-db-sqlite-busy-timeout: "5m"
+# Default: "30m"
+db-sqlite-busy-timeout: "30m"
 ```
diff --git a/docs/configuration/general.md b/docs/configuration/general.md
index cf2bb5c30..285852afe 100644
--- a/docs/configuration/general.md
+++ b/docs/configuration/general.md
@@ -23,11 +23,21 @@ log-level: "info"
 # Default: false
 log-db-queries: false
 
+# Bool. Include the client IP in the emitted log lines
+# Options: [true, false]
+# Default: true
+log-client-ip: true
+
 # String. Application name to use internally.
 # Examples: ["My Application","gotosocial"]
 # Default: "gotosocial"
 application-name: "gotosocial"
 
+# String. The user that will be shown instead of the landing page. if no user is set, the landing page will be shown.
+# Examples: "admin"
+# Default: ""
+landing-page-user: ""
+
 # String. Hostname that this server will be reachable at. Defaults to localhost for local testing,
 # but you should *definitely* change this when running for real, or your server won't work at all.
 # DO NOT change this after your server has already run once, or you will break things!
@@ -44,7 +54,9 @@ host: "localhost"
 #
 # You should also redirect requests at "example.org/.well-known/nodeinfo" in the same way.
 #
-# You should also redirect requests at "example.org/.well-known/host-meta" in the same way. This endpoint is used by a number of clients to discover the API endpoint to use when the host and account domain are different.
+# You should also redirect requests at "example.org/.well-known/host-meta" in the same way. This endpoint
+# is used by a number of clients to discover the API endpoint to use when the host and account domain are
+# different.
 #
 # An empty string (ie., not set) means that the same value as 'host' will be used.
 #
diff --git a/docs/configuration/media.md b/docs/configuration/media.md
index 880a2bc95..7bc3ad6ad 100644
--- a/docs/configuration/media.md
+++ b/docs/configuration/media.md
@@ -7,7 +7,7 @@
 ##### MEDIA CONFIG #####
 ########################
 
-# Config pertaining to user media uploads (videos, image, image descriptions).
+# Config pertaining to media uploads (videos, image, image descriptions, emoji).
 
 # Int. Maximum allowed image upload size in bytes.
 # Examples: [2097152, 10485760]
@@ -53,6 +53,6 @@ media-emoji-local-max-size: 51200
 # This strikes a good balance between decent interoperability with instances that have
 # higher emoji size limits, and not taking up too much space in storage.
 # Examples: [51200, 102400]
-# Default: 51200
+# Default: 102400
 media-emoji-remote-max-size: 102400
 ```
diff --git a/docs/configuration/observability.md b/docs/configuration/observability.md
index ddd423be9..6c812a8fc 100644
--- a/docs/configuration/observability.md
+++ b/docs/configuration/observability.md
@@ -9,10 +9,6 @@ These settings let you tune and configure certain observability related behaviou
 ##### OBSERVABILITY SETTINGS #####
 ##################################
 
-# Bool. Enable generation/parsing of a request ID for each received HTTP Request.
-# Default: true
-request-id-enabled: true
-
 # String. Header name to use to extract a request or trace ID from. Typically set by a
 # loadbalancer or proxy.
 # Default: "X-Request-Id"
diff --git a/docs/configuration/oidc.md b/docs/configuration/oidc.md
index de321a55e..b30cd8410 100644
--- a/docs/configuration/oidc.md
+++ b/docs/configuration/oidc.md
@@ -79,9 +79,8 @@ oidc-scopes:
 # Default: false
 oidc-link-existing: false
 
-# Array of string. If the returned ID token contains a 'groups' claim that
-# matches one of the groups in oidc-admin-groups, then this user will be granted
-# admin rights on the GtS instance
+# Array of string. If the returned ID token contains a 'groups' claim that matches one of the
+# groups in oidc-admin-groups, then this user will be granted admin rights on the GtS instance
 # Default: []
 oidc-admin-groups: []
 ```
diff --git a/docs/configuration/storage.md b/docs/configuration/storage.md
index 9808669f9..e8715f48a 100644
--- a/docs/configuration/storage.md
+++ b/docs/configuration/storage.md
@@ -24,11 +24,9 @@ storage-local-base-path: "/gotosocial/storage"
 
 # String. API endpoint of the S3 compatible service.
 # Only required when running with the s3 storage backend.
-#
-# If your endpoint contains the bucket name, all files will be put into a
-# subdirectory with the name of `storage-s3-bucket`
-#
 # Examples: ["minio:9000", "s3.nl-ams.scw.cloud", "s3.us-west-002.backblazeb2.com"]
+# GoToSocial uses "DNS-style" when accessing buckets.
+# If you are using Scaleways object storage, please remove the "bucket name" from the endpoint address
 # Default: ""
 storage-s3-endpoint: ""
 
@@ -36,6 +34,7 @@ storage-s3-endpoint: ""
 #
 # Default: false
 storage-s3-proxy: false
+
 # Bool. Use SSL for S3 connections.
 #
 # Only set this to 'false' when testing locally.
@@ -49,12 +48,14 @@ storage-s3-use-ssl: true
 # Examples: ["AKIAJSIE27KKMHXI3BJQ","miniouser"]
 # Default: ""
 storage-s3-access-key: ""
+
 # String. Secret key part of the S3 credentials.
 # Consider setting this value using environment variables to avoid leaking it via the config file
 # Only required when running with the s3 storage backend.
 # Examples: ["5bEYu26084qjSFyclM/f2pz4gviSfoOg+mFwBH39","miniopassword"]
 # Default: ""
 storage-s3-secret-key: ""
+
 # String. Name of the storage bucket.
 #
 # If you have already encoded your bucket name in the storage-s3-endpoint, this
diff --git a/docs/configuration/syslog.md b/docs/configuration/syslog.md
index cf983e0b2..17adc95f6 100644
--- a/docs/configuration/syslog.md
+++ b/docs/configuration/syslog.md
@@ -32,7 +32,7 @@ syslog-enabled: false
 
 # String. Protocol to use when directing logs to syslog. Leave empty to connect to local syslog.
 # Options: ["udp", "tcp", ""]
-# Default: "tcp"
+# Default: "udp"
 syslog-protocol: "udp"
 
 # String. Address:port to send syslog logs to. Leave empty to connect to local syslog.
diff --git a/docs/configuration/tls.md b/docs/configuration/tls.md
index 79bc509eb..933d71e32 100644
--- a/docs/configuration/tls.md
+++ b/docs/configuration/tls.md
@@ -52,7 +52,7 @@ letsencrypt-email-address: ""
 ##### MANUAL TLS CONFIG  #####
 ##############################
 
-# String. Path to a PEM-encoded file on disk that includes the certificate chain 
+# String. Path to a PEM-encoded file on disk that includes the certificate chain
 # and the public key
 # Examples: ["/gotosocial/storage/certs/chain.pem"]
 # Default: ""
diff --git a/example/config.yaml b/example/config.yaml
index 823a126b3..a56f4d35e 100644
--- a/example/config.yaml
+++ b/example/config.yaml
@@ -231,8 +231,8 @@ db-sqlite-cache-size: "8MiB"
 # If set to empty string or zero, the sqlite default will be used.
 # See: https://www.sqlite.org/pragma.html#pragma_busy_timeout
 # Examples: ["0s", "1s", "30s", "1m", "5m"]
-# Default: "5s"
-db-sqlite-busy-timeout: "5m"
+# Default: "30m"
+db-sqlite-busy-timeout: "30m"
 
 cache:
   # Cache configuration options:
@@ -246,7 +246,7 @@ cache:
   #### VISIBILITY CACHES ######
   #############################
   #
-  # Configure Status and account 
+  # Configure Status and account
   # visibility cache.
 
   visibility-max-size: 2000
@@ -265,7 +265,7 @@ cache:
     account-ttl: "30m"
     account-sweep-freq: "1m"
 
-    block-max-size: 100
+    block-max-size: 1000
     block-ttl: "30m"
     block-sweep-freq: "1m"
 
@@ -289,6 +289,10 @@ cache:
     follow-request-ttl: "30m"
     follow-request-sweep-freq: "1m"
 
+    instance-max-size: 2000
+    instance-ttl: "30m"
+    instance-sweep-freq: "1m"
+
     list-max-size: 2000
     list-ttl: "30m"
     list-sweep-freq: "1m"
@@ -331,7 +335,7 @@ cache:
 
     webfinger-max-size: 250
     webfinger-ttl: "24h"
-    webfinger-sweep-freq: "1m"
+    webfinger-sweep-freq: "15m"
 
 ######################
 ##### WEB CONFIG #####
@@ -490,7 +494,7 @@ media-emoji-local-max-size: 51200
 # This strikes a good balance between decent interoperability with instances that have
 # higher emoji size limits, and not taking up too much space in storage.
 # Examples: [51200, 102400]
-# Default: 51200
+# Default: 102400
 media-emoji-remote-max-size: 102400
 
 ##########################
@@ -515,7 +519,7 @@ storage-local-base-path: "/gotosocial/storage"
 # String. API endpoint of the S3 compatible service.
 # Only required when running with the s3 storage backend.
 # Examples: ["minio:9000", "s3.nl-ams.scw.cloud", "s3.us-west-002.backblazeb2.com"]
-# GoToSocial uses "DNS-style" when accessing buckets. 
+# GoToSocial uses "DNS-style" when accessing buckets.
 # If you are using Scaleways object storage, please remove the "bucket name" from the endpoint address
 # Default: ""
 storage-s3-endpoint: ""
@@ -524,6 +528,7 @@ storage-s3-endpoint: ""
 #
 # Default: false
 storage-s3-proxy: false
+
 # Bool. Use SSL for S3 connections.
 #
 # Only set this to 'false' when testing locally.
@@ -537,12 +542,14 @@ storage-s3-use-ssl: true
 # Examples: ["AKIAJSIE27KKMHXI3BJQ","miniouser"]
 # Default: ""
 storage-s3-access-key: ""
+
 # String. Secret key part of the S3 credentials.
 # Consider setting this value using environment variables to avoid leaking it via the config file
 # Only required when running with the s3 storage backend.
 # Examples: ["5bEYu26084qjSFyclM/f2pz4gviSfoOg+mFwBH39","miniopassword"]
 # Default: ""
 storage-s3-secret-key: ""
+
 # String. Name of the storage bucket.
 #
 # If you have already encoded your bucket name in the storage-s3-endpoint, this
@@ -632,7 +639,7 @@ letsencrypt-email-address: ""
 ##### MANUAL TLS CONFIG  #####
 ##############################
 
-# String. Path to a PEM-encoded file on disk that includes the certificate chain 
+# String. Path to a PEM-encoded file on disk that includes the certificate chain
 # and the public key
 # Examples: ["/gotosocial/storage/certs/chain.pem"]
 # Default: ""
@@ -775,7 +782,7 @@ syslog-enabled: false
 
 # String. Protocol to use when directing logs to syslog. Leave empty to connect to local syslog.
 # Options: ["udp", "tcp", ""]
-# Default: "tcp"
+# Default: "udp"
 syslog-protocol: "udp"
 
 # String. Address:port to send syslog logs to. Leave empty to connect to local syslog.
@@ -939,7 +946,7 @@ advanced-throttling-multiplier: 8
 # Minimum resolution is 1 second.
 #
 # Examples: [30s, 10s, 5s, 1m]
-# Default: 30s
+# Default: "30s"
 advanced-throttling-retry-after: "30s"
 
 # Int. CPU multiplier for the amount of goroutines to spawn in order to send messages via ActivityPub.
diff --git a/internal/config/defaults.go b/internal/config/defaults.go
index 34e46b342..dc076bdc7 100644
--- a/internal/config/defaults.go
+++ b/internal/config/defaults.go
@@ -107,7 +107,7 @@ var Defaults = Configuration{
 	SMTPPort:               0,
 	SMTPUsername:           "",
 	SMTPPassword:           "",
-	SMTPFrom:               "GoToSocial",
+	SMTPFrom:               "",
 	SMTPDiscloseRecipients: false,
 
 	TracingEnabled:           false,
@@ -122,7 +122,8 @@ var Defaults = Configuration{
 	AdvancedCookiesSamesite:      "lax",
 	AdvancedRateLimitRequests:    300, // 1 per second per 5 minutes
 	AdvancedThrottlingMultiplier: 8,   // 8 open requests per CPU
-	AdvancedSenderMultiplier:     2,   // 2 senders per CPU
+	AdvancedThrottlingRetryAfter: time.Second * 30,
+	AdvancedSenderMultiplier:     2, // 2 senders per CPU
 
 	Cache: CacheConfiguration{
 		GTS: GTSCacheConfiguration{