Add TLS group and sig scheme TLVs

Add two new constants to mirror changes from this upstream commit:
https://git.haproxy.org/?p=haproxy.git;a=commitdiff;h=d738fa4ec0f82de03c85eb8f8590791686098fd1

Author: emersion

tlv.go

@@ -12,18 +12,20 @@ import (
 
 const (
 	// Section 2.2
-	PP2_TYPE_ALPN           PP2Type = 0x01
-	PP2_TYPE_AUTHORITY      PP2Type = 0x02
-	PP2_TYPE_CRC32C         PP2Type = 0x03
-	PP2_TYPE_NOOP           PP2Type = 0x04
-	PP2_TYPE_UNIQUE_ID      PP2Type = 0x05
-	PP2_TYPE_SSL            PP2Type = 0x20
-	PP2_SUBTYPE_SSL_VERSION PP2Type = 0x21
-	PP2_SUBTYPE_SSL_CN      PP2Type = 0x22
-	PP2_SUBTYPE_SSL_CIPHER  PP2Type = 0x23
-	PP2_SUBTYPE_SSL_SIG_ALG PP2Type = 0x24
-	PP2_SUBTYPE_SSL_KEY_ALG PP2Type = 0x25
-	PP2_TYPE_NETNS          PP2Type = 0x30
+	PP2_TYPE_ALPN              PP2Type = 0x01
+	PP2_TYPE_AUTHORITY         PP2Type = 0x02
+	PP2_TYPE_CRC32C            PP2Type = 0x03
+	PP2_TYPE_NOOP              PP2Type = 0x04
+	PP2_TYPE_UNIQUE_ID         PP2Type = 0x05
+	PP2_TYPE_SSL               PP2Type = 0x20
+	PP2_SUBTYPE_SSL_VERSION    PP2Type = 0x21
+	PP2_SUBTYPE_SSL_CN         PP2Type = 0x22
+	PP2_SUBTYPE_SSL_CIPHER     PP2Type = 0x23
+	PP2_SUBTYPE_SSL_SIG_ALG    PP2Type = 0x24
+	PP2_SUBTYPE_SSL_KEY_ALG    PP2Type = 0x25
+	PP2_SUBTYPE_SSL_GROUP      PP2Type = 0x26
+	PP2_SUBTYPE_SSL_SIG_SCHEME PP2Type = 0x27
+	PP2_TYPE_NETNS             PP2Type = 0x30
 
 	// Section 2.2.7, reserved types
 	PP2_TYPE_MIN_CUSTOM     PP2Type = 0xE0