rls: be sure From and To URIs are parsed

- if RLS SUBSCRIBE is handled before any other module needed From or To
  URIs, then the structures were not filled, resulting in using empty
  username and domain to locate the RLS document
- reported by Peter Dunkley

modules_k/rls/subscribe.c

@@ -36,6 +36,7 @@
 #include "../../lib/kcore/cmpapi.h"
 #include "../../lib/kcore/hash_func.h"
 #include "../../lib/kcore/parse_supported.h"
+#include "../../lib/kcore/parser_helpers.h"
 #include "../../parser/msg_parser.h"
 #include "../../parser/parse_event.h"
 #include "../../parser/parse_expires.h"
@@ -432,7 +433,7 @@ int rls_handle_subscribe(struct sip_msg* msg, char* s1, char* s2)
 		return 0;
 	}
 	/* check for To and From headesr */
-	if(parse_to_header(msg)<0 || parse_from_header(msg)<0)
+	if(parse_to_uri(msg)<0 || parse_from_uri(msg)<0)
 	{
 		LM_ERR("failed to find To or From headers\n");
 		if (slb.freply(msg, 400, &pu_400_rpl) < 0)