inet: raw -- Skip IP_FREEBIND for ipv6 SOCK_RAW sockets

IP_FREEBIND is not supported for SOCK_RAW ipv6 sockets.
See kernel rawv6_setsockopt() for the details.

For the rest of sockets, where they begin to support it:
the actual magic happens in do_ipv6_setsockopt(), and
IPV6_ADDRFORM optname changes sk->sk_prot to refer
to tcp_prot, udp_prot and udplite_prot, which contains
link to ip_setsockopt().
Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Andrei Vagin <avagin@gmail.com>

criu/sk-inet.c

@@ -840,7 +840,7 @@ int inet_bind(int sk, struct inet_sk_info *ii)
 	 * sockets could not be bound to them in this moment
 	 * without setting IP_FREEBIND.
 	 */
-	if (ii->ie->family == AF_INET6) {
+	if (ii->ie->family == AF_INET6 && ii->ie->type != SOCK_RAW) {
 		int yes = 1;
 
 		if (restore_opt(sk, SOL_IP, IP_FREEBIND, &yes))