Resolve "Network Processor"

Closes #93

See merge request !74

Resolve "Support Sending FIN"

See merge request !80

These were previously inferred latches, but now that they are not, we
need to register them explicitly, otherwise they will be 0

After removing all the inferred latches, we have enough space to have 2
TCP streams instead of just 1. Also we have way more timing slack.

Lesson learned, inferred latches are *really* bad and you should remove
them first before anything else.

Calculate checksum for tcp data also

See merge request !77

Resolve "Send TCP data over M2S"

See merge request !76

need to wait until checksum i presume

I think we need to actually do checksum for data

Resolve "Calculate TCP Checksum"

See merge request !75

Otherwise it does not fit in the T20