core: new internal msg flag added - FL_RR_ADDED

- marks a sip request when record route is added

parser/msg_parser.h

@@ -122,6 +122,7 @@ typedef enum request_method {
 #define FL_TM_RPL_MATCHED    (1<<15)  /* tm matched reply already */
 #define FL_RPL_SUSPENDED     (1<<16)  /* for async reply processing */
 #define FL_BODY_MULTIPART    (1<<17)  /* body modified is multipart */
+#define FL_RR_ADDED          (1<<18)  /* Record-Route header was added */
 
 /* WARNING: Value (1 << 28) is temporarily reserved for use in kamailio call_control
  * module (flag  FL_USE_CALL_CONTROL )! */