Merge pull request #3204 from jmeit/master

Given --uid add all its gids automatically

Author: Unitech

lib/ProcessContainerFork.js

@@ -52,10 +52,13 @@ if (process.connected &&
 // uid/gid management
 if (process.env.uid || process.env.gid) {
   try {
-    if (process.env.uid)
-      process.setuid(process.env.uid);
     if (process.env.gid)
       process.setgid(process.env.gid);
+    if (process.env.uid){
+      process.initgroups(process.env.uid, process.env.uid);
+      process.setgid(process.env.uid);
+      process.setuid(process.env.uid);
+    }
   } catch(e) {
     setTimeout(function() {
       console.error('%s on call %s', e.message, e.syscall);