* keygen.c (make_backsig): If DO_BACKSIGS is not defined, do not create

backsigs.

* getkey.c (merge_selfsigs_subkey): Find 0x19 backsigs on subkey selfsigs
and verify they are valid.  If DO_BACKSIGS is not defined, fake this as
always valid.

* packet.h, parse-packet.c (parse_signature): Make parse_signature
non-static so we can parse 0x19s in self-sigs.

* main.h, sig-check.c (check_backsig): Check a 0x19 signature.
(signature_check2): Give a backsig warning if there is no or a bad 0x19
with signatures from a subkey.

g10/keygen.c

@@ -531,10 +531,12 @@ make_backsig(PKT_signature *sig, PKT_public_key *pk,
   PKT_signature *backsig;
   int rc;
 
+#ifndef DO_BACKSIGS
   /* This is not enabled yet, as I want to get a bit closer to RFC day
      before enabling this.  I've been burned before :) */
 
   return 0;
+#endif
 
   cache_public_key (sub_pk);