Make EVP_Digest*() routines return a value.

TODO: update docs, and make soe other routines
which use EVP_Digest*() check return codes.

"make depend"

The filenames we are interested in for Makefile dependencies
are always relative.

Change mkerr.pl so that it puts the ERR_load_..._strings()
prototype in header files that it writes.

(It cannot possibly help to avoid duplicate 'name of file' strings
in object files because the preprocessor does not work at object file
level.)

including EC arithmetics derived from Lenka Fibikova's code (with some
additional optimizations).

Submitted by Brad Dominy <jdominy@darwinuser.org>

(they can't do much useful, but they will have to set pointers
to NULL)

(This will be used for Lim/Lee precomputation data.)

the method misses something.

Initial EC_GROUP_new_curve_GFp implementation.

abort with errors if no name is defined for some object, which was the
case for 'pilotAttributeType 27'.

Also avoid this very situation by assigning the name
'pilotAttributeType27'.

Rename 'EC_GROUP_set'-related functions to names similar to 'EC_GROUP_set_curve'
because they don't care about the generator.

Add new functions.

previous commit).

Add EC vaporware: change relevant Makefiles and add some empty source
files.

"make update".

for Windows compilations if DLL linkage is required or not.