I fixed this in the most expedient way, I'm happy to go about it another way if you don't like it
Unit Tests Skipped
you are right, I missed that. Sorry about that. Let me change the code in sctp_crc32.c such that we don't need any SCTP specific include files anymore. Give me a day or two.
I committed a fix in https://svnweb.freebsd.org/changeset/base/327200. I changed the code in sctp_crc32c.c such that it does not rely on any other SCTP sources. This way it does not require any changes to sctp_os_bsd.h.
Thanks for reporting the issue and providing a suggested solution!