BUG/MEDIUM: http: fix improper parsing of HTTP methods for use with ACLs

pat_parse_meth() had some remains of an early implementation attempt for
the patterns, it initialises a trash and never sets the pattern value there.
The result is that a non-standard method cannot be matched anymore. The bug
appeared during the pattern rework in 1.5, so this fix must be backported
there. Thanks to Joe Williams of GitHub for reporting the bug.
diff --git a/src/proto_http.c b/src/proto_http.c
index dc4787d..f0dd0c8 100644
--- a/src/proto_http.c
+++ b/src/proto_http.c
@@ -9851,20 +9851,13 @@
 static int pat_parse_meth(const char *text, struct pattern *pattern, int mflags, char **err)
 {
 	int len, meth;
-	struct chunk *trash;
 
 	len  = strlen(text);
 	meth = find_http_meth(text, len);
 
 	pattern->val.i = meth;
 	if (meth == HTTP_METH_OTHER) {
-		trash = get_trash_chunk();
-		if (trash->size < len) {
-			memprintf(err, "no space avalaible in the buffer. expect %d, provides %d",
-			          len, trash->size);
-			return 0;
-		}
-		pattern->ptr.str = trash->str;
+		pattern->ptr.str = (char *)text;
 		pattern->len = len;
 	}
 	else {