ifenslave: Add new package
network-interfaces: Add the ability to create bond devices

This patch adds support for the creations of new bond devices, aggregate
pipes of physical devices for extra throughput or failover.

Additionally, add better correction at the startup of a bridge
of vlan interface (delete old, stale interfaces).
Merge pull request #1432 from wkennington/bond

network-interfaces: Add the ability to create bond devices