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.]

Submitted by: Nils Larsch

Make sure the type accessed by the LONG and ZLONG ASN1 type
is really a long, to avoid problems on platforms where
sizeof(int) != sizeof(long).

Submitted by: Nils Larsch <nla@trustcenter.de>

OPENSSL_DES_PRE_0_9_7_COMPATIBILITY is defined.  NOT AT ALL TESTED YET!
Add a comment as to the libdes compatibility.

line, which I forgot when spliting one.

Fix warnings about signed/unsigned mismatch and global
shadowing (random, index) in hw_4758_cca.c

very broken, and there are working modules in CPAN, which makes our
module even more moot.

any other errors that may be left in the error queue

Submitted by: Jeffrey Altman

consistent with the rest of the AEP functions

Increase internal security when using strncpy, by making sure the resulting string is NUL-terminated