dotcloud/docker — pull request #1577 by mrallen1 (2013-08-18 06:01:41+00:00)
Title: Prevent DNS server conflicts in CreateBridgeIface

Fixes #1502

* Read /etc/resolv.conf and extract listed nameservers. Format them as CIDR blocks ("1.2.3.4/32")
* Check for conflicts when generating a bridge network block
* Add tests to cover extensions in utils and network