UPDATE prosody 0.12.1 from MAINTAINER

Hi ports@,

Here is an straightforward update for Prosody. Main points of release
notes [1] are:

- mod_http (and dependent modules): Make CORS opt-in by default
- mod_http: Reintroduce support for disabling or limiting CORS
- net.unbound: Disable use of hosts file by default
- MUC: Allow kicking users with the same affiliation as the kicker;
fixing an issue and improves Jitsi Meet compatibility
- mod_tombstones: Add caching to improve performance on busy servers;
fixes mod_tombstone: inefficient I/O with internal storage

Portwise, the patches for our and Fedora (or CentOS or some other RHEL
derived OS) outdated LuaSocket were merged.

[1]: https://blog.prosody.im/prosody-0.12.1-released/

-Lucas