openssl.c: make damn sure e_os.h knows about OPENSSL_C

(Should we point to snapshots, or directly give the one-line patch?)

I hope all memory leaks that may occur here have already been tracked down.

that is actually used (even though it may not appear so at first
sight).

This was meant for building individual ciphers separately;
but nothing of this is maintained, it does not work
because we rely on central configuration by the Configure
utility with <openssl/opensslconf.h> etc., so the files
are only wasting space and time.

lib$-functions and sys$-functions.

in addition to the crypto library.

"openssl list-standard-commands".

In testss, use MD5 as digest algorithm so that the resulting
certificates can be used for testssl with RSA.