Fixup for 0053326492c1919 Added pbkdf password hash convenience functions... (forgot to include a file in that patch).

There's no reason for these sorts of internal functions to take &KEY
arguments.  Make the functions fixed-airty and remove a bit of code
duplication in the process.

We were attempting to bit-bash (SIMPLE-ARRAY (UNSIGNED-BYTE 64) (*)) on
32-bit platforms, and that doesn't work so well.  Rework the test for
using bit-bashing to avoid this situation.
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#	modified:   src/digests/digest.lisp
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This change requires making the code more generic at a slight runtime
performance cost.  I think the assembly changes will at least compensate
for this change on appropriate implementations.  For those
implementations where said assembly changes do not exist, patches
welcome.  (Those implementations may not have cared terribly much about
the performance of Ironclad, anyway.)

For now, we'll optimize some of the digest functions.

* Remove the :tth digest type.
* Just have MAKE-TIGER-TREE-HASH do the Right Thing.
* Remove the dependency on binascii in the test vectors.
* Instead, split tests between tree-hash.testvec and binascii tests.

HMAC depends on it, so it shouldn't be buried in the ciphers code.
Thanks to Jochen Schmidt for pointing this out.

Inlining all the MOD32-FUNC primitives and functions that use them can
cause problems for implementations that don't support modular
arithmetic.  Plus there's no benefit in doing so; it's just code bloat.
Define appropriate features and liberally sprinkle conditionals in the
appropriate digest implementations.

Thanks to Stelian Ionescu for noticing this.

Thanks to Stelian Ionescu for pointing this out.

Turns out ciphers--via (SETF %FIND-CIPHER)--and digests need it.  The
new directory structure hid that, and it must have worked by accident
earlier due to ASDF's dependency traversal.  Tidy up some dependencies
while we're at it.