let's change it's suffix from .c to .h.  This also avoids some
otherwise very mysterious (and probably sensible from a historical
point of view :-)) name changes done by mk1mf.pl.

fingerprints.

Otherwise, the test target will fail because libcrypto.sha1 is missing
or not up to date.

that macro.

It's possible that OPENSSL_UNISTD_IO should be used instead of
OPENSSL_UNISTD, for the MSDOS case...

make update.

non-FIPS mode.

Update the appropriate fingerprints accordingly.
(something is weird, someone else was working on the same stuff, and
removed fips_sha1_selftest.c from fips/sha1/standalone.sha1...)

strlen(), memcmp(), exit() and others to be used without a proper
declaration.

Update the appropriate fingerprints accordingly.

weren't due to that, but to a change on the SCO machines I used for
testing, where my $PATH was suddenly incorrect.