[NETNS]: Process INET socket layer in the correct namespace.

Replace all the reast of the init_net with a proper net on the socket
layer.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --cc net/ipv4/af_inet.c
Simple merge

diff --cc net/ipv4/inet_connection_sock.c
Simple merge

diff --cc net/ipv4/raw.c
Simple merge

diff --cc net/ipv4/udp.c
Simple merge