[CRIU] Checkpoint with running "ping" shall script

[Pavel Emelyanov]

That's the error:

> Error (sockets.c:94): Unknown pair family 2 proto 1

This is AF_INET IPPROTO_ICMP socket. CRIU doesn't support this type
of sockets (yet). We only work with AF_UNIX, AF_NETLINK, AF_PACKET
and AF_INET/AF_INET6 types IPPROTO_UDP and IPPROTO_TCP.

-- Pavel