[openbsd-compat/sha2.c] First stab at portability glue for SHA256
KEX support, should work with libc SHA256 support or OpenSSL
EVP_sha256 if present
+ - (djm) [includes.h] Restore accidentally dropped netinet/in.h
20060313
- (dtucker) [configure.ac] Bug #1171: Don't use printf("%lld", longlong)