Modifies the LSM netlink_send() hook so that it takes a struct sock parameter.
 SELinux will use this parameter to lookup the class of socket, which was
assigned during socket security initialization.

Cc: David S. Miller <davem@redhat.com>
Signed-off-by: James Morris <jmorris@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>