Update dependencies.

  and BN_get_sign
- implement BN_set_negative as a function
- always use "#define BN_is_zero(a) ((a)->top == 0)"

util/libeay.num is important when building shared libraries, like
VMS.

Fix typo in mk1mf.pl

Avoid more shadow warnings.

Remove more bogus shadow warnings.

Process kerberos include and library options.

(void * != char *)

(void * != RSA *)

Update symbols

to use it.

Fix Win32 build system to use 'Makefile' instead of 'Makefile.ssl'.

of dual-ABI Unix/Win64 modules.

compressed tables (2x compression factor) and by pre-fetching them into
processor cache prior every CBC en-/decryption pass. One can argue why
just CBC? Well, it's commonly used mode in real-life applications and
API allows us to amortize the prefetch costs for larger data chunks...