botan: additional openssl dependency

Added OpenSSL dependency, added a Python dependency for the older
systems to try and support those a little better, and double quotes
everywhere. The download location has also moved upstream. Any attempt
to use the old one just gets a redirect to the new one, so I’ve just
switched it. For some reason the checksum has changed, but the pgp
signature for the download file was verified fine.
botan: add 1.10.8_1 bottle.