Changes for NET3.017
This is mostly small stuff as follows:
o accept()ed socket don't end up with an invalid sk->socket and give bogus
netstat output.
o FASYNC/SIGIO now works with sockets.
o Fixed the permissions on F_SETOWN for all. Its now as broken/working
as other systems. Really we need something like a 32bit generation
number on processes.
o ARP allows proxy for whole networks (a la cisco routers)
o TCP sendto() reports ENOTCONN in the right cases
o Removed some surplus uncommented code from tcp.c
o Fixed protocol violation during closedown in tcp.c
[Still not got the window < MSS bug fix included]
Fixes for 1.1.58
o non blocking connect fail gets the error code right.
o select() not reporting read ok after an urgent read fixed.