• PHP 8.0: tons of fixes to support 8.0, this is probably the last container using PHP 7.4 by default
• Addressbook: new REST API for contacts https://github.com/EGroupware/egroupware/tree/master/doc/REST-CalDAV-CardDAV
• LDAP/Addressbook: fix region contains for given country invalid value gives an LDAP error on update
• Admin/Filemanager: correctly encode user "WORKGROUP$user" for SMB mounts and do NOT require mountpoints to exist
• Filemanager: fix not working variables eg. $user in GUI mount (Admin > Filemanager)
• Filemanager: fix video controller not working in filemanager gallery
• Filemanager: add action to unlock files
• Filemanager: fix super user could not remove other users' subscriptions
• Filemanager: add actions to convert editable files to PDF or PNG and a checkbox to merge file as PDF
• Collabora: merge placeholder dialogs
• All apps: add preference to set directory and filename of merged documents using placeholders
• Calendar: fix changing the recurrence end date did not add/remove the events in the UI
• InfoLog: fix not working overwrite check (optimistic locking) plus incrementing etag
• Mail: make sure pressing [del] key twice in a row does not delete the first row on the second press
• Mail: add set flags action into mail filters
• Mail: implements date extension for vacation rule. None imap admin user can also set vacation rule by date.
• Kanban: fix deleting card did not delete link to the board (includes a DB update to remove orphans from links)
• Resources: add inventory number to resource list columns
• smallPART/PostgreSQL: fix SQL error when opening a course
• smallPART/PostgreSQL: fix SQL error during update (you need to restore egw_smallpart* tables AND set egw_applications.app_version='21.1')
• API: update jQuery-ui to 1.13.0 and TinyMCE to 5.10.1
• Extended changelog