Merge branch 'selftests-net-various'

Willem de Bruijn says:

====================
selftests/net: various

A few odds and ends to network tests:

- msg_zerocopy: run as part of kselftest
- udp gso:      add missing bounds test for minimal sizes
- psocket_snd:  initial basic conformance test
====================

Signed-off-by: David S. Miller <davem@davemloft.net>