Log Message:
Update www/davical to 1.1.11

From https://wiki.davical.org/index.php?title=Release_Notes/1.1.11:

=== Bug Fixes ===
* Tasks show up in Free/Busy (#257)
* php compatibility: Creating principal fails on 8.1 (#271)
* PHP 8 deprecations: htmlspecialchars in always.php (#266)
* PHP 8: "Exception [0] array_flip(): Argument #1 ($array) must be of
  type array, null given" at principal-edit.php (#260)
* Exception in inc/iSchedule.php, Argument #1 must be of type
  Countable|array (#252)
* Users with passwords containing a quotation mark cannot login (#259)
* Create new users, impossible... (#250)
* Wrong FreeBusy duration when the DTSTART of the event is the same as
  the DTEND (#247)
* Remove deprecated get_magic_quotes* function call from setup.php (234)
* "Login failure" when password contains HTML special characters (#229)

=== Other Changes ===
* Changes to Gitlab CI, unit and regression tests