Add aep and sureware implementations and clean up some error reasons
that were never part of the engine framework.

The aep and sureware implementations are taken directly from 0.9.6c

Add aep and sureware implementations and clean up some error reasons
that were never part of the engine framework.

The aep and sureware implementations are taken directly from 0.9.6c
[engine] and have been modified to fit the newer engine framework and
to be possible to build shared libraries of.

The aep implementation has gone through quite a bunch of tests and is
cleaned up (there were some misunderstandings in it about how to use
locks).

The sureware hasn't been tested at all in this incarnation and is
basically a quick hack to get it to compile properly.

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default_algorithms option in ENGINE config.

Initial ENGINE config module, docs to follow.

Fix buffer overrun errors in OPENSSL_conf().

This change adds cipher and digest support into ENGINE using the
ENGING_TABLE mechanism. The necessary hooks from crypto/evp/ to use this
will be committed shortly.

This change replaces the ENGINE's underlying mechanics with the new
ENGINE_TABLE-based stuff - as described in crypto/engine/README.

Associated miscellaneous changes;
- the previous

This change replaces the ENGINE's underlying mechanics with the new
ENGINE_TABLE-based stuff - as described in crypto/engine/README.

Associated miscellaneous changes;
- the previous cipher/digest hooks that hardwired directly to EVP's
OBJ_NAME-based storage have been backed out. New cipher/digest support
has been constructed and will be committed shortly.
- each implementation defines its own ENGINE_load_<name> function now.
- the "openssl" ENGINE isn't needed or loaded any more.
- core (not algorithm or class specific) ENGINE code has been split into
multiple files to increase readability and decrease linker bloat.
- ENGINE_cpy() has been removed as it wasn't really a good idea in the
first place and now, because of registration issues, can't be
meaningfully defined any more.
- BN_MOD_EXP[_CRT] support is removed as per the README.
- a bug in enginetest.c has been fixed.

NB: This commit almost certainly breaks compilation until subsequent
changes are committed.

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Some of the ENGINE file names were changed for 8.3 filename uniqueness
recently. So comments including file names have been fixed, and copyright
notices brought up to "2001" at the same time.

make engine file names unique in 8.3