dirmngr: Fix https incorrectly reported in help

* dirmngr/ks-engine-http.c (ks_hkp_help): Only print https if tls
is supported.

--
Wrong reporting was pointed out by K_F. Check is the same as
in ks-engine-hkp.c

dirmngr/ks-engine-http.c

@@ -38,7 +38,9 @@ ks_http_help (ctrl_t ctrl, parsed_uri_t uri)
   const char const data[] =
     "Handler for HTTP URLs:\n"
     "  http://\n"
+#if  HTTP_USE_GNUTLS || HTTP_USE_NTBTLS
     "  https://\n"
+#endif
     "Supported methods: fetch\n";
   gpg_error_t err;