devserver: Listen for connections via IPv6

As the Internet runs out of IPv4 addresses, it's going to become
important to be able to update via IPv6.

BUG=chromium-os:13161
TEST=Run the devserver, have a client check for updates, verify that it still works

Change-Id: Ia41ed1582d352f187b507412ea55a92c68e86a02
Reviewed-on: http://gerrit.chromium.org/gerrit/1253
Tested-by: Aaron Plattner <aplattner@nvidia.com>
Reviewed-by: Chris Sosa <sosa@chromium.org>
1 file changed