- Forced commit to update who actually did this code (I forgot
the obtained from in the original line)
Obtained from: Weongyo Jeong (weongyo.jeong@gmail.com)

sctp_process_inpcb() wants an offset parameter in size_t,
so define it as what it is expected. This fixes WARNS=3
without NO_WERROR build.

Adds support for SCTP.