RT 2820: Case-insensitive filenames on Darwin
RT 2820: Case-insensitive filenames on Darwin

Add darwin-*-cc as one of the systems for case-insensitive
filenames.  Fixes the manpage install so it doesn't create
looping symlinks.

openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl