[kronolith] Ical writeable

[Chuck Hagenbuch]

Quoting Martin Hochreiter <linuxbox at wavenet.at>:

> With the current version 2.2 -3 is the URL
> https://server/rpc.php/kronolith/username.ics not readable (returns no
> content) and the subscription URL from the "My calendar" page
> https://server/kronolith/ics.php?c=username works only readable -
> if you change/create something nothing is happening (in debug log - no
> errors)

It's now /rpc.php/kronolith/username/username.ics.

-chuck