make no-sha512 more effective on platforms, which don't support 64-bit
integer type of *any* kind.

http://www.opengroup.org/onlinepubs/007908799/xsh/compilation.html.

Notified by David Wolfe <dwolfe5272@yahoo.com>

inspired by VC6 failure report. In addition abstain from taking screen
snapshots when running in NT service context.

Submitted by: Goetz Babin-Ebell

warning when using gcc 4.0

PR: 1073

compiled into *our* aplpications. That's because mingw is always
consistent with itself. Having library-side code linked into .dll
makes it possible to deploy the .dll with user-code compiled with
another compiler [which is pretty much the whole point behind Applink].

The 0.9.8 branch is called OpenSSL_0_9_8-stable.

PR: 1070

first everywhere in crypto and skip stdio.h and string.h [because it
includes them].

[most importantly] put back dependencies accidentaly eliminated in
check-in #13342.

- hide the EC_KEY structure definition in ec_lcl.c + add
  some functions to use/access the EC_KEY fields
- change the way how method specific data (ecdsa/ecdh) is
  attached to a EC_KEY
- add ECDSA_sign_ex and ECDSA_do_sign_ex functions with
  additional parameters for pre-computed values
- rebuild libeay.num from 0.9.7

timing attacks.

BN_FLG_EXP_CONSTTIME requests this algorithm, and this done by default for
RSA/DSA/DH private key computations unless
RSA_FLAG_NO_EXP_CONSTTIME/DSA_FLAG_NO_EXP_CONSTTIME/
DH_FLAG_NO_EXP_CONSTTIME is set.

Submitted by: Matthew D Wood
Reviewed by: Bodo Moeller