The 2nd big splitting patch -- move most of the code that is
infect-related and doesn't know about criu internals (like
protobuf) out of types.h headers.

This is also big and fat patch, but it just moves the code
around. Applies on top of sigframe extracting patch.

Travis: https://travis-ci.org/xemul/criu/builds/171439595Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-and-ported-on-dev-by: Pavel Emelyanov <xemul@virtuozzo.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>