Some updates to test cases
Merge branch 'mypdrill' into more_tests

Signed-off-by: Christoph Paasch <christoph.paasch@uclouvain.be>

Conflicts:
	gtests/net/packetdrill/examples/tests/tcp_headers/tcp_cork_on_08-bis.pkt
	gtests/net/packetdrill/examples/tests/tcp_headers/tcp_cork_on_08.pkt
	gtests/net/packetdrill/examples/tests/tcp_headers/tcp_nodelay_off_01.pkt