[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

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.

for ecdh)

("perl util/ck_errf.pl */*.c */*/*.c" still reports many more.)

if $(EXHEADER) is empty.

Notified by many, solution suggested by Carson Gaspar <carson@taltos.org>

Reported by: Maxim Masiutin
Submitted by: Nils Larsch

dh.h, dsa.h, ec.h, ecdh.h, ecdsa.h, rsa.h), as the opaque bignum types are
already declared in ossl_typ.h. Add explicit includes for bn.h in those C
files that need access to structure internals or API functions+macros.

tree. This further reduces header interdependencies, and makes some
associated cleanups.

changes are the fallout). As this could break source code that doesn't
directly include headers for interfaces it uses, changes to recursive
includes are covered by the OPENSSL_NO_DEPRECATED symbol. It's better to
define this when building and using openssl, and then adapt code where
necessary - this is how to stay current. However the mechanism exists for
the lethargic.

- bugfix: in ECDH_compute_key, pad x coordinate with leading zeros if necessary

under cygwin.

always give the expected result on some platforms.

I've covered all the memset()s I felt safe modifying, but may have missed some.

Submitted by: Nils Larsch

Submitted by: Nils Larsch

Submitted by: Sheueling Chang <Sheueling.Chang@Sun.COM>

give it.
For 0.9.7 and up, that means util/domd needs to remove those double
dashes from the argument list when gcc is used to find the
dependencies.

EC_GROUP_new_by_nid() should be enough.  This avoids a lot of
redundancy.

Submitted by: Nils Larsch

Submitted by: Nils Larsch