dirmngr: Replace stpcpy chains by strconcat.
* dirmngr/certcache.c (find_cert_bysn): Use strconcat. (find_cert_bysubject): Ditto. * dirmngr/http.c (store_header): Ditto. * dirmngr/ldap.c (make_url): Ditto. * dirmngr/server.c (get_cert_local_ski): Ditto. (do_get_cert_local): Use xstrconcat.
- Signed-off-by: Werner Koch <wk@gnupg.org>