[chore]: Bump github.com/miekg/dns from 1.1.55 to 1.1.56 (#2204)

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

vendor/github.com/miekg/dns/README.md

@@ -81,6 +81,7 @@ A not-so-up-to-date-list-that-may-be-actually-current:
 * https://addr.tools/
 * https://dnscheck.tools/
 * https://github.com/egbakou/domainverifier
+* https://github.com/semihalev/sdns
 
 
 Send pull request if you want to be listed here.

vendor/github.com/miekg/dns/defaults.go

@@ -5,6 +5,7 @@ import (
 	"net"
 	"strconv"
 	"strings"
+	"unicode"
 )
 
 const hexDigit = "0123456789abcdef"
@@ -330,8 +331,18 @@ func Fqdn(s string) string {
 
 // CanonicalName returns the domain name in canonical form. A name in canonical
 // form is lowercase and fully qualified. See Section 6.2 in RFC 4034.
+// According to the RFC all uppercase US-ASCII letters in the owner name of the
+// RR areeplaced by the corresponding lowercase US-ASCII letters.
 func CanonicalName(s string) string {
-	return strings.ToLower(Fqdn(s))
+	var result strings.Builder
+	for _, ch := range s {
+		if unicode.IsUpper(ch) && (ch >= 0x00 && ch <= 0x7F) {
+			result.WriteRune(unicode.ToLower(ch))
+		} else {
+			result.WriteRune(ch)
+		}
+	}
+	return Fqdn(result.String())
 }
 
 // Copied from the official Go code.

vendor/github.com/miekg/dns/msg.go

@@ -896,23 +896,38 @@ func (dns *Msg) String() string {
 		return "<nil> MsgHdr"
 	}
 	s := dns.MsgHdr.String() + " "
-	s += "QUERY: " + strconv.Itoa(len(dns.Question)) + ", "
-	s += "ANSWER: " + strconv.Itoa(len(dns.Answer)) + ", "
-	s += "AUTHORITY: " + strconv.Itoa(len(dns.Ns)) + ", "
-	s += "ADDITIONAL: " + strconv.Itoa(len(dns.Extra)) + "\n"
+	if dns.MsgHdr.Opcode == OpcodeUpdate {
+		s += "ZONE: " + strconv.Itoa(len(dns.Question)) + ", "
+		s += "PREREQ: " + strconv.Itoa(len(dns.Answer)) + ", "
+		s += "UPDATE: " + strconv.Itoa(len(dns.Ns)) + ", "
+		s += "ADDITIONAL: " + strconv.Itoa(len(dns.Extra)) + "\n"
+	} else {
+		s += "QUERY: " + strconv.Itoa(len(dns.Question)) + ", "
+		s += "ANSWER: " + strconv.Itoa(len(dns.Answer)) + ", "
+		s += "AUTHORITY: " + strconv.Itoa(len(dns.Ns)) + ", "
+		s += "ADDITIONAL: " + strconv.Itoa(len(dns.Extra)) + "\n"
+	}
 	opt := dns.IsEdns0()
 	if opt != nil {
 		// OPT PSEUDOSECTION
 		s += opt.String() + "\n"
 	}
 	if len(dns.Question) > 0 {
-		s += "\n;; QUESTION SECTION:\n"
+		if dns.MsgHdr.Opcode == OpcodeUpdate {
+			s += "\n;; ZONE SECTION:\n"
+		} else {
+			s += "\n;; QUESTION SECTION:\n"
+		}
 		for _, r := range dns.Question {
 			s += r.String() + "\n"
 		}
 	}
 	if len(dns.Answer) > 0 {
-		s += "\n;; ANSWER SECTION:\n"
+		if dns.MsgHdr.Opcode == OpcodeUpdate {
+			s += "\n;; PREREQUISITE SECTION:\n"
+		} else {
+			s += "\n;; ANSWER SECTION:\n"
+		}
 		for _, r := range dns.Answer {
 			if r != nil {
 				s += r.String() + "\n"
@@ -920,7 +935,11 @@ func (dns *Msg) String() string {
 		}
 	}
 	if len(dns.Ns) > 0 {
-		s += "\n;; AUTHORITY SECTION:\n"
+		if dns.MsgHdr.Opcode == OpcodeUpdate {
+			s += "\n;; UPDATE SECTION:\n"
+		} else {
+			s += "\n;; AUTHORITY SECTION:\n"
+		}
 		for _, r := range dns.Ns {
 			if r != nil {
 				s += r.String() + "\n"

vendor/github.com/miekg/dns/types.go

@@ -236,6 +236,9 @@ var CertTypeToString = map[uint16]string{
 	CertOID:     "OID",
 }
 
+// Prefix for IPv4 encoded as IPv6 address
+const ipv4InIPv6Prefix = "::ffff:"
+
 //go:generate go run types_generate.go
 
 // Question holds a DNS question. Usually there is just one. While the
@@ -751,6 +754,11 @@ func (rr *AAAA) String() string {
 	if rr.AAAA == nil {
 		return rr.Hdr.String()
 	}
+
+	if rr.AAAA.To4() != nil {
+		return rr.Hdr.String() + ipv4InIPv6Prefix + rr.AAAA.String()
+	}
+
 	return rr.Hdr.String() + rr.AAAA.String()
 }
 
@@ -1517,7 +1525,7 @@ func (a *APLPrefix) str() string {
 	case net.IPv6len:
 		// add prefix for IPv4-mapped IPv6
 		if v4 := a.Network.IP.To4(); v4 != nil {
-			sb.WriteString("::ffff:")
+			sb.WriteString(ipv4InIPv6Prefix)
 		}
 		sb.WriteString(a.Network.IP.String())
 	}

vendor/github.com/miekg/dns/version.go

@@ -3,7 +3,7 @@ package dns
 import "fmt"
 
 // Version is current version of this library.
-var Version = v{1, 1, 55}
+var Version = v{1, 1, 56}
 
 // v holds the version of this library.
 type v struct {