mod_auth_cas v1.2-RC1

[David Hawes]

mod_auth_cas v1.2-RC1 has been tagged:

https://github.com/apereo/mod_auth_cas/tree/v1.2-RC1

Various bugfixes and documentation updates are included as well as:

- OpenSSL 1.1 support
- CASv2 attributes
- CASPreserveTicket, which allows tickets to pass through when a valid
session exists.

If you'd like to help with testing, please pull the tag and give us
feedback (this thread or a GitHub issue are both fine).

Thanks,

David