More window-removals as they make tests unstable

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

Signed-off-by: Christoph Paasch <christoph.paasch@uclouvain.be>
Bugs from the github issues
More Tests

Signed-off-by: Christoph Paasch <christoph.paasch@uclouvain.be>
Make so_rcvbuf-sndbuff actually work on mptcp_trunk

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