Remove the PSK code. We don't need to drag around this
baggage.
ok miod@ jsing@
Revert change that snuck into previous commit.
More e_os2.h clean up. Also move the includes inside the guard.

ok deraadt@ who also has a similar diff.
Remove the commentary about the majority of this code being under
'BSD-style Open Source licenses'.

It is a bit improper of OpenSSL to classify themselves into the BSD
community without a clear justification for the extra clauses / terms...
Fetch the specific license which will be used from
    https://www.openssl.org/~appro/camellia/dist/BSD_license.txt
It isn't our concern to supply the other licences mentioned in source
files; that is realy not our problem.
pour some water on an ass ember
spotted by doctor jsing, always keeping an eye out for these
Suspicions confirmed by sthen's searching that nothing uses ossl_ssize_t
except embedded openssl's in other trees.