Add gid to clixon_process_register() for drop privs

apps/backend/backend_plugin_restconf.c

@@ -314,7 +314,7 @@ restconf_pseudo_process_control(clicon_handle h)
     if (clixon_process_register(h, RESTCONF_PROCESS,
                                 "Clixon RESTCONF process",
                                 NULL /* XXX network namespace */,
-                                -1,
+                                -1, -1,
                                 restconf_rpc_wrapper,
                                 argv, nr) < 0)
         goto done;