Change the way m_sslmodes handles non-ssl users in ssl-only channels

Edit :: 4 January 2013

This module adds a config option `<security:handleinsecure>` with two options. `kick` and `notice`.

If set to `kick` the non-ssl user being force-joined to the secure channel will be immediately kicked.

If set to `notice` the server will notice the channel and remove channel mode `z`

Edit :: I'll rebase this all into 1 commit before it's merged, if it's accepted.