install to a different location than it had created. (BTW, VMS will need a
matching fix in eng_list.c.) Note, these aren't ssl-specific, so I'm
putting "engines/" into the libs directory rather than at the "--prefix"
level or inside "ssl/".

think that proper Makefile clean-up is required.

key operations using the GMP library. The default is not to build (or use)
this code unless OPENSSL_USE_GMP is defined (because it will impose header
and linker dependencies that might need specifying too).

- define a HERE variable to indicate where the source tree is (used
  very little right now)
- make more use of copying and making attribute changes to {file}.new,
  and then move it to {file}
- use 'mv -f' to avoid all those questions to the user when the file
  in question doesn't have write attributes for that user.

depend upon.