Make patchable.

Reported by:	kris-unbuildable-ports-reminder

net/ser/files/patch-parser::msg_parser.h

@@ -3,14 +3,6 @@ $FreeBSD$
 
 --- parser/msg_parser.h.orig
 +++ parser/msg_parser.h
-@@ -193,6 +193,7 @@
- 	struct hdr_field* accept_disposition;
- 	struct hdr_field* diversion;
- 	struct hdr_field* rpid;
-+	struct hdr_field* server;
- 
- 	char* eoh;        /* pointer to the end of header (if found) or null */
- 	char* unparsed;   /* here we stopped parsing*/
 @@ -287,7 +288,11 @@
  	
  	/* topmost Via is part of transaction key as well ! */