[refactor] Implement silent fork via spawn stdio options.

Author: AvianFlu

lib/forever/monitor.js

@@ -214,11 +214,8 @@ Monitor.prototype.trySpawn = function () {
   this.spawnWith.env = this._getEnv();
 
   if (this.fork) {
-    this.spawnWith.silent = true;
-    return fork(
-      path.join(__dirname, '..', '..', 'bin', 'fork-shim'),
-      [this.command].concat(this.args), this.spawnWith
-    );
+    this.spawnWith.stdio = [ 'pipe', 'pipe', 'pipe', 'ipc' ];
+    return spawn(this.command, this.args, this.spawnWith);
   }
 
   return spawn(this.command, this.args, this.spawnWith);