NixOS/nixpkgs — pull request #2917 by chrisfarms (2014-06-12 13:22:40+00:00)
Title: Add openvswitch package + basic nixos module to enable it

Adds:

* Openvswitch package
* The beginnings of a nixos module to configure it
* Adds the ovs-* tools to libvirtd's path so that libvirtd can manage the vswitch.