v0.24

v0.24 (October 3, 2017)
-----------------------

System:

* Install PHP7 via a PPA. Switch to the on-demand process manager.

Mail:

* Updated to [Roundcube 1.3.1](https://roundcube.net/news/2017/06/26/roundcube-webmail-1.3.0-released), but unfortunately dropping the Vacation plugin because it has not been supported by its author and is not compatible with Roundcube 1.3, and updated the persistent login plugin.
* Updated to [Z-Push 2.3.8](http://download.z-push.org/final/2.3/z-push-2.3.8.txt).
* Dovecot now uses stronger 2048 bit DH params for better forward secrecy.

Nextcloud:

* Nextcloud updated to 12.0.3, using PHP7.

Control Panel:

* Nameserver (NS) records can now be set on custom domains.
* Fix an erroneous status check error due to IPv6 address formatting.
* Aliases for administrative addresses can now be set to send mail to +tag administrative addresses.