TUN-4922: Downgrade quic-go library to 0.20.0

vendor/github.com/lucas-clemente/quic-go/internal/qtls/go116.go

@@ -1,5 +1,4 @@
 // +build go1.16
-// +build !go1.17
 
 package qtls
 
@@ -10,7 +9,7 @@ import (
 	"net"
 	"unsafe"
 
-	"github.com/marten-seemann/qtls-go1-16"
+	qtls "github.com/marten-seemann/qtls-go1-16"
 )
 
 type (
@@ -53,6 +52,21 @@ const (
 	EncryptionApplication = qtls.EncryptionApplication
 )
 
+// CipherSuiteName gets the name of a cipher suite.
+func CipherSuiteName(id uint16) string {
+	return qtls.CipherSuiteName(id)
+}
+
+// HkdfExtract generates a pseudorandom key for use with Expand from an input secret and an optional independent salt.
+func HkdfExtract(hash crypto.Hash, newSecret, currentSecret []byte) []byte {
+	return qtls.HkdfExtract(hash, newSecret, currentSecret)
+}
+
+// HkdfExpandLabel HKDF expands a label
+func HkdfExpandLabel(hash crypto.Hash, secret, hashValue []byte, label string, L int) []byte {
+	return qtls.HkdfExpandLabel(hash, secret, hashValue, label, L)
+}
+
 // AEADAESGCMTLS13 creates a new AES-GCM AEAD for TLS 1.3
 func AEADAESGCMTLS13(key, fixedNonce []byte) cipher.AEAD {
 	return qtls.AEADAESGCMTLS13(key, fixedNonce)