• PHP: security update to 8.4.16
• Calendar: fixed not tracked participant-changes in recurring events or recurrence-exceptions
• Calendar: allow slightly wrong Recurrence-ID seen with older Exchange server and ignore name-prefix or case in email-address of participant
• Addressbook: fix focus on not editable name field: open name popup for new contacts or on keyboard for existing ones
• Addressbook/REST API: fix not working unset of single fields or objects with a null value, we also use now consistent "private" instead of "home"
• InfoLog/CalDAV: fix PHP TypeError array_merge() parameter #1 must be of type array, null given happening with Thunderbird and tasks