• New: For preset addressbooks, are re-discovery is performed upon every login by default. This means that newly added
  addressbooks on the server are discovered and added, whereas addressbooks that have been removed from the server are
  also removed from roundcube.
  • NOTE TO ADMINS: If you are using addressbook presets, please read the documentation on the new preset setting
    rediscover_mode to decide if re-discovery is desired or not. The new default is functionally safe, but performance
    can be improved if the new behavior is not needed.
  • For manually-added addressbooks, this will require changes to the rcmcarddav data model, which is planned for
    version 5.
  • Version 5 will also have a more elaborate version of re-discovery that will allow to configure it such that it does
    not happen on every login.
• MySQL: Convert potentially used row format COMPACT (was default up to MySQL 5.7.8, Maria DB 10.2.1) to DYANMIC in
  migration 12, which would otherwise fail (Fixes #362). It requires some other settings that have to be configured in
  the MySQL server configuration additionally, all of which are also defaults since MySQL 5.7.7 / Maria DB 10.2.2.