[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

attribute in EVP_PKEY structure.

is made to directly cast a function of one type to what it considers and
incompatible type. In particular gcc 3.4.2.

Add new openssl_fcast macro to place functions into a form where the compiler
will allow them to be cast.

The current version achives this by casting to: void function(void).

(Also improve util/ck_errf.pl script, and occasionally
fix source code formatting.)

EC_GROUP_new_by_nid -> EC_GROUP_new_by_curve_name

during "make errors" and thus during "make update".

Fix lots of bugs that util/ck_errf.pl can detect automatically.
Various others of these are still left to fix; that's why
"make update" will complain loudly when run now.

	EC_GROUP_get_nid -> EC_GROUP_get_curve_name
	EC_GROUP_set_nid -> EC_GROUP_set_curve_name

is used with constant assertion.

PR: 1059

there's no need to undefine it here.  Then, let's get a bit paranoid
and not define BN_ULLONG on THIRTY_TWO_BIT machines when BN_LLONG
isn't defined.

useful anyway

for now (it was broken anyway)