[chore]: Bump github.com/miekg/dns from 1.1.56 to 1.1.57 (#2439)

Bumps [github.com/miekg/dns](https://github.com/miekg/dns) from 1.1.56 to 1.1.57.
- [Changelog](https://github.com/miekg/dns/blob/master/Makefile.release)
- [Commits](https://github.com/miekg/dns/compare/v1.1.56...v1.1.57)

---
updated-dependencies:
- dependency-name: github.com/miekg/dns
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

1 files changed, 14 insertions, 4 deletions

diff --git a/vendor/github.com/miekg/dns/xfr.go b/vendor/github.com/miekg/dns/xfr.go
index 0a831c880..05b3c5add 100644
--- a/vendor/github.com/miekg/dns/xfr.go
+++ b/vendor/github.com/miekg/dns/xfr.go
@@ -80,8 +80,13 @@ func (t *Transfer) In(q *Msg, a string) (env chan *Envelope, err error) {
 
 func (t *Transfer) inAxfr(q *Msg, c chan *Envelope) {
 	first := true
-	defer t.Close()
-	defer close(c)
+	defer func() {
+		// First close the connection, then the channel. This allows functions blocked on
+		// the channel to assume that the connection is closed and no further operations are
+		// pending when they resume.
+		t.Close()
+		close(c)
+	}()
 	timeout := dnsTimeout
 	if t.ReadTimeout != 0 {
 		timeout = t.ReadTimeout
@@ -131,8 +136,13 @@ func (t *Transfer) inIxfr(q *Msg, c chan *Envelope) {
 	axfr := true
 	n := 0
 	qser := q.Ns[0].(*SOA).Serial
-	defer t.Close()
-	defer close(c)
+	defer func() {
+		// First close the connection, then the channel. This allows functions blocked on
+		// the channel to assume that the connection is closed and no further operations are
+		// pending when they resume.
+		t.Close()
+		close(c)
+	}()
 	timeout := dnsTimeout
 	if t.ReadTimeout != 0 {
 		timeout = t.ReadTimeout