* g10.c (main): New --gnupg option to disable the various --openpgp,

--pgpX, etc. options.  This is the same as --no-XXXX for those options.

* packet.h, getkey.c (skip_disabled), keylist.c (print_capabilities): New
"pk_is_disabled" macro to retrieve the cached disabled value if available,
and fill it in via cache_disabled_value if not available.

* trustdb.h, gpgv.c (is_disabled), trustdb.c (is_disabled): Rename to
cache_disabled_value.  Cache the result of the check so we don't need to
hit the trustdb more than once.

* trustdb.c (get_validity): Cache the disabled value since we have it
handy and it might be useful later.

g10/getkey.c

@@ -747,7 +747,7 @@ skip_disabled(void *dummy,u32 *keyid)
       goto leave;
     }
  
-  disabled=is_disabled(pk);
+  disabled=pk_is_disabled(pk);
 
  leave:
   free_public_key(pk);