So, this time we've mostly have a lot of code rework for
compel. A big portion of it is still in criu-dev, but
some has been merged into master.

Other than this and a bunch of bugfixes -- .config file,
support for Tun-Tap devices and deprecation of several
CLI and RPC options by the --external one.
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>