Log message:
Add z-push 2.2.10 to pkgsrc.

Z-Push is an open-source implementation of the Microsoft ActiveSync protocol.
It can be used to synchronize emails (including push notifications), personal
contacts and calendar items between a central HTTP server and a mobile device.
It supports a wide range of IMAP, CalDAV and CardDAV servers.

It provides a way to push mails to a mobile phone through ActiveSync
including iOS devices.

XXX This requires a specific PHP module from project Zarafa (PHP-MAPI) at
    run time. This will be provided in another package.