Merge branch 'mg/gpg-interface-using-status'

Call "gpg" using the right API when validating the signature on
tags.

* mg/gpg-interface-using-status:
  pretty: make %GK output the signing key for signed commits
  pretty: parse the gpg status lines rather than the output
  gpg_interface: allow to request status return
  log-tree: rely upon the check in the gpg_interface
  gpg-interface: check good signature in a reliable way

builtin/fmt-merge-msg.c

@@ -492,7 +492,7 @@ static void fmt_merge_msg_sigs(struct strbuf *out)
 
 		if (size == len)
 			; /* merely annotated */
-		else if (verify_signed_buffer(buf, len, buf + len, size - len, &sig)) {
+		else if (verify_signed_buffer(buf, len, buf + len, size - len, &sig, NULL)) {
 			if (!sig.len)
 				strbuf_addstr(&sig, "gpg verification failed.\n");
 		}