Don't allocate a new identity list in the new session's options.

The previous list is not freed. Since the new session just got
created, an identity list is already allocated and empty.

Signed-off-by: Sebastien Boving <seb@google.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
(cherry picked from commit e020dd8d59)

src/options.c

@@ -93,12 +93,6 @@ int ssh_options_copy(ssh_session src, ssh_session *dest) {
     if (src->opts.identity) {
         struct ssh_iterator *it;
 
-        new->opts.identity = ssh_list_new();
-        if (new->opts.identity == NULL) {
-            ssh_free(new);
-            return -1;
-        }
-
         it = ssh_list_get_iterator(src->opts.identity);
         while (it) {
             char *id;