gpg: Add new option --only-sign-text-ids.

* g10/options.h (opt): Add field only_sign_text_ids.
* g10/gpg.c (enum cmd_and_opt_values): Add value oOnlySignTextIDs.
(opts): Handle oOnlySignTextIDs.
(main): Likewise.
* g10/keyedit.c (sign_uids): If OPT.ONLY_SIGN_TEXT_IDS is set, don't
select non-text based IDs automatically.
(keyedit_menu): Adapt the prompt asking to sign all user ids according
to OPT.ONLY_SIGN_TEXT_IDS.
* doc/gpg.texi: Document the new option --only-sign-text-ids.

--
Signed-off-by: Neal H. Walfield <neal@g10code.com>
GnuPG-bug-id: 1241
Debian-bug-id: 569702

g10/gpg.c

@@ -392,6 +392,7 @@ enum cmd_and_opt_values
     oTOFUDBFormat,
     oWeakDigest,
     oUnwrap,
+    oOnlySignTextIDs,
 
     oNoop
   };
@@ -755,6 +756,7 @@ static ARGPARSE_OPTS opts[] = {
   ARGPARSE_s_s (oFakedSystemTime, "faked-system-time", "@"),
   ARGPARSE_s_s (oWeakDigest, "weak-digest","@"),
   ARGPARSE_s_n (oUnwrap, "unwrap", "@"),
+  ARGPARSE_s_n (oOnlySignTextIDs, "only-sign-text-ids", "@"),
 
   /* Aliases.  I constantly mistype these, and assume other people do
      as well. */
@@ -3308,6 +3310,9 @@ main (int argc, char **argv)
           case oUnwrap:
             opt.unwrap_encryption = 1;
             break;
+          case oOnlySignTextIDs:
+            opt.only_sign_text_ids = 1;
+            break;
 
           case oDisplay:
             set_opt_session_env ("DISPLAY", pargs.r.ret_str);