Allow the plugin to determine whether or not an empty timeout is

allowed.  For sudoers, an error will be returned for an empty timeout.

plugins/sudoers/policy.c

@@ -307,7 +307,6 @@ sudoers_policy_deserialize_info(void *v, char **runas_user, char **runas_group)
 	    continue;
 	}
 	if (MATCHES(*cur, "timeout=")) {
-	    CHECK(*cur, "timeout=");
 	    p = *cur + sizeof("timeout=") - 1;
 	    user_timeout = parse_timeout(p);
 	    if (user_timeout == -1) {

src/parse_args.c

@@ -428,8 +428,7 @@ parse_args(int argc, char **argv, int *nargc, char ***nargv,
 		    break;
 #endif
 		case 'T':
-		    if (*optarg == '\0')
-			usage(1);
+		    /* Plugin determines whether empty timeout is allowed. */
 		    sudo_settings[ARG_TIMEOUT].value = optarg;
 		    break;
 		case 'S':