set uid timeout

Allow the timeout to be changed allowing more time before dropping root
privledges

lib/config.js

@@ -103,7 +103,8 @@ var defaults = {
     setuid: {
         enabled: false,
         "group": "users",
-        "user": "nobody"
+        "user": "nobody",
+        "timeout": 15
     },
 };
 

lib/setuid.js

@@ -11,5 +11,5 @@ if (Config.get("setuid.enabled")) {
             console.log('Cowardly refusing to keep the process alive as root.');
             process.exit(1);
         }
-    }, 15);
+    }, (Config.get("setuid.timeout")));
 };