https://forums.bitfire.at/topic/1190/davdroid-1-3-has-been-released/2
1.3.1.
* always use PROPFIND instead of REPORT
addressbook-query to improve compatibility (for instance with
Daylite)
* cert4android: remove "unkown
certificate" notification as soon as there are no more pending
decisions
* new translations (thanks to the
contributors)