upstream commit

make IdentityFile successfully load and use certificates that
have no corresponding bare public key. E.g. just a private id_rsa and
certificate id_rsa-cert.pub (and no id_rsa.pub).

bz#2617 ok dtucker@

Upstream-ID: c1e9699b8c0e3b63cc4189e6972e3522b6292604
diff --git a/ssh.c b/ssh.c
index 5e50fa0..8aa8daa 100644
--- a/ssh.c
+++ b/ssh.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: ssh.c,v 1.447 2016/09/30 09:19:13 markus Exp $ */
+/* $OpenBSD: ssh.c,v 1.448 2016/12/06 07:48:01 djm Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -2127,8 +2127,9 @@
 			free(cp);
 			continue;
 		}
+		/* NB. leave filename pointing to private key */
+		identity_files[n_ids] = xstrdup(filename);
 		identity_keys[n_ids] = public;
-		identity_files[n_ids] = cp;
 		n_ids++;
 	}