LXC does not build out-of-tree
Update the config file for 3.14 host kernel

This allows to decrease the local migration time to reasonable values
Improve LXC build
Support LXC guests in core.gz

An LXC guest cannot get kernel parameters from procfs, so use a proper
/etc file
Support for network configuration in LXC guests

Again, an LXC guest cannot read kernel parameters from procfs...
Use a /etc file instead