The main change is that Niels Provos kindly agreed to rescind the BSD license advertising clause, shifting them to the 3-term BSD license. This was the last thing in OpenSSH that used the advertising clause.
[openbsd-compat/blf.h openbsd-compat/blowfish.c] [openbsd-compat/openbsd-compat.h] Start at supporting bcrypt_pbkdf in portable.