[master] Allow the ADD token to be used as a hex string in IPv6 address

Allow the ADD token to be used as a hex string in IPv6 address

RELNOTES

@@ -114,6 +114,10 @@ by Eric Young (eay@cryptsoft.com).
   the issue and suggesting the patch.
   [ISC-Bugs #38631]
 
+- While parsing IPv6 addresses treat "add" as part of the address instead
+  of as a token.
+  [ISC-Bugs #39529]
+
 			Changes since 4.3.2rc2
 - None
 

common/parse.c

@@ -384,10 +384,11 @@ parse_ip6_addr(struct parse *cfile, struct iaddr *addr) {
 	 */
 	v6_len = 0;
 	for (;;) {
-		if ((((token == NAME) || (token == NUMBER_OR_NAME)) && 
+		if ((((token == NAME) || (token == NUMBER_OR_NAME)) &&
 		     is_hex_string(val)) ||
-		    (token == NUMBER) || 
-		    (token == DOT) || 
+		    (token == NUMBER) ||
+		    (token == TOKEN_ADD) ||
+		    (token == DOT) ||
 		    (token == COLON)) {
 
 			next_raw_token(&val, NULL, cfile);