vendor: update all dependencies to latest versions

vendor/golang.org/x/net/dns/dnsmessage/message.go

@@ -13,7 +13,7 @@ import (
 	"errors"
 )
 
-// Packet formats
+// Message formats
 
 // A Type is a type of DNS request and response.
 type Type uint16
@@ -789,6 +789,12 @@ func (m *Message) Unpack(msg []byte) error {
 
 // Pack packs a full Message.
 func (m *Message) Pack() ([]byte, error) {
+	return m.AppendPack(make([]byte, 0, packStartingCap))
+}
+
+// AppendPack is like Pack but appends the full Message to b and returns the
+// extended buffer.
+func (m *Message) AppendPack(b []byte) ([]byte, error) {
 	// Validate the lengths. It is very unlikely that anyone will try to
 	// pack more than 65535 of any particular type, but it is possible and
 	// we should fail gracefully.
@@ -813,17 +819,15 @@ func (m *Message) Pack() ([]byte, error) {
 	h.authorities = uint16(len(m.Authorities))
 	h.additionals = uint16(len(m.Additionals))
 
-	msg := make([]byte, 0, packStartingCap)
-
-	msg = h.pack(msg)
+	msg := h.pack(b)
 
 	// RFC 1035 allows (but does not require) compression for packing. RFC
 	// 1035 requires unpacking implementations to support compression, so
 	// unconditionally enabling it is fine.
 	//
 	// DNS lookups are typically done over UDP, and RFC 1035 states that UDP
-	// DNS packets can be a maximum of 512 bytes long. Without compression,
-	// many DNS response packets are over this limit, so enabling
+	// DNS messages can be a maximum of 512 bytes long. Without compression,
+	// many DNS response messages are over this limit, so enabling
 	// compression will help ensure compliance.
 	compression := map[string]int{}
 
@@ -1203,7 +1207,7 @@ func (b *Builder) AAAAResource(h ResourceHeader, r AAAAResource) error {
 	return nil
 }
 
-// Finish ends message building and generates a binary packet.
+// Finish ends message building and generates a binary message.
 func (b *Builder) Finish() ([]byte, error) {
 	if b.section < sectionHeader {
 		return nil, ErrNotStarted

vendor/golang.org/x/net/dns/dnsmessage/message_test.go

@@ -852,6 +852,31 @@ func smallTestMsg() Message {
 	}
 }
 
+func BenchmarkPack(b *testing.B) {
+	msg := largeTestMsg()
+
+	b.ReportAllocs()
+
+	for i := 0; i < b.N; i++ {
+		if _, err := msg.Pack(); err != nil {
+			b.Fatal(err)
+		}
+	}
+}
+
+func BenchmarkAppendPack(b *testing.B) {
+	msg := largeTestMsg()
+	buf := make([]byte, 0, packStartingCap)
+
+	b.ReportAllocs()
+
+	for i := 0; i < b.N; i++ {
+		if _, err := msg.AppendPack(buf[:0]); err != nil {
+			b.Fatal(err)
+		}
+	}
+}
+
 func largeTestMsg() Message {
 	name := mustNewName("foo.bar.example.com.")
 	return Message{