[Owncloud] Can no longer sync calendars

[peter at chubb.wattle.id.au]

Since git pull this morning on the master, I can no longer sync to
iPad or Android.

Visiting https://my.server.addr/owncloud/remote.php/caldav/ redirects
to the index page now.

https://my.server.addr/owncloud/remote.php/caldav/principals/username/
yields an empty page.

Any ideas?