Josh Kupershmidt

provided by Andrew.

right, there seems precious little reason to have a pile of hand-maintained
endianness definitions in src/include/port/*.h.  Get rid of those, and make
the couple of places that used them depend on WORDS_BIGENDIAN instead.

Few cleanups and couple of new things:

 - add SHA2 algorithm to older OpenSSL
 - add BIGNUM math to have public-key cryptography work on non-OpenSSL
   build.
 - gen_random_bytes() function

The status of SHA2 algoritms and public-key encryption can now be
changed to 'always available.'

That makes pgcrypto functionally complete and unless there will be new
editions of AES, SHA2 or OpenPGP standards, there is no major changes
planned.

versions of OpenSSL.  If your OpenSSL does not contain SHA2, then there
should be no conflict.  But ofcourse, if someone upgrades OpenSSL,
server starts crashing.

Backpatched to 8.1.X.

Marko Kreen

compiler warnings.  Marko Kreen and Kris Jurka.

Marko Kreen

be more wary about having a value for BYTE_ORDER, clean up randomly-
chosen ways of including Postgres core headers.
Marko Kreen and Tom Lane