case-insensitive file systems.

Contributed by Lutz Jaenicke.

I know it's earlier than announced.  The high amount of problems in
beta1 warants this, however.

I know, this isn't really a OpenSSL issue, but we keep getting
questions about it, so we might as well provide the solution...

which isn't true.  What is true, however, is that SSH assumes it is.

SunOS 4.1.4).

Don't copy private key to X509 etc public key structures.
Fix for warning.