Restructure implementation of EC_GROUP_check().

Submitted by: Nils Larsch

Submitted by: Nils Larsch

Add some WTLS curves.
New function EC_GROUP_check() (this will probably
be implemented differently soon).

Submitted by: Nils Larsch
Reviewed by: Bodo Moeller

Submitted by: Nils Larsch

Ensure EVP_CipherInit() uses the correct encode/decode parameter if
enc == -1

[Reported by Markus Friedl <markus@openbsd.org>]

Fix typo in dh_lib.c (use of DSAerr instead of DHerr).

Add to 'config'.

Initialize cipher context in KRB5
("D. Russell" <russelld@aol.net>)

Allow HMAC functions to use an alternative ENGINE.

Fix dsaparam usage output.

Submitted by: Nils Larsch

BIO_nwrite0/BIO_nwrite (the previous code was OK for BIO pairs but not
in general)

Undo previous patch: avoid warnings by #undef'ing
duplicate definitions.

Suggested by "Kenneth R. Robinette" <support@securenetterm.com>

Fix Kerberos warnings with VC++.

Fix ASN1 additions for KRB5

Fix various warnings when compiling with KRB5 code.

Make ciphers and digests obtain an ENGINE functional reference
if impl is explicitly supplied.

Make {RSA,DSA,DH}_new_method obtain and release an ENGINE
functional reference in all cases.

Fix the Win32_rename() function so it correctly
returns an error code. Use the same code in Win9X
and NT.

Fix some ca.c options so they work under Win32:
unlink/rename wont work under Win32 unless the file
is closed.

Submitted by: Nils Larsch

not return immediately since that leaves a locked lock.

Submitted by: Nils Larsch

Remove unnecessary 'const'.

ENGINE module additions.

Add "init" command to control ENGINE
initialization.

Call ENGINE_finish on initialized ENGINEs on exit.

Reorder shutdown in apps.c: modules should be shut
down first.

Add test private key loader to openssl ENGINE: this
just loads a private key in PEM format.

Fix print format for dh length parameter.

Submitted by: Nils Larsch

moment at least), so remove it

  [Chosen plaintext attack: R. Merkle, M. Hellman: "On the Security of
  Multiple Encryption", CACM 24 (1981) pp. 465-467, p. 776.

  Known plaintext angriff: P.C. van Oorschot, M. Wiener: "A
  known-plaintext attack on two-key triple encryption", EUROCRYPT '90.]