Revert "tty: don't read from console stream upon creation"

This reverts commit 4611389.

The offending commit broke certain usages of piping from stdin.

Fixes: nodejs#5927
PR-URL: nodejs#5947
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Alexis Campailla <orangemocha@nodejs.org>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

lib/tty.js

@@ -17,23 +17,17 @@ function ReadStream(fd, options) {
   if (!(this instanceof ReadStream))
     return new ReadStream(fd, options);
 
-  // pauseOnCreate to avoid reading from the sytem buffer
   options = util._extend({
     highWaterMark: 0,
     readable: true,
     writable: false,
-    handle: new TTY(fd, true),
-    pauseOnCreate: true
+    handle: new TTY(fd, true)
   }, options);
 
   net.Socket.call(this, options);
 
   this.isRaw = false;
   this.isTTY = true;
-
-  // Let the stream resume automatically when 'data' event handlers
-  // are added, even though it was paused on creation
-  this._readableState.flowing = null;
 }
 inherits(ReadStream, net.Socket);