[CRIU] [PATCH cr 00/08] rework logic about lock/unlock network (v3)

[Andrey Vagin]

Network should be locked before dumping and unlocked after restoring.

When a socket is going out from repair mode, it sends winprobe,
so network should be unlocked in this moment.

In addition this series adds two options to set lock/unlock scripts,
which are used to lock/unlock network in a target name space.

v2: don't read an inet image two times
v3: A common engine for scripts and a few minor cerrections