* commit 'eaab56a1': (47 commits)
  ZP-1059 Detect Ubuntu 16.04 and add php-mbstring as dependency.
  ZP-1071 Also set flags in the list (if not set).
  ZP-1071 Add documentation TODO, fixed variable names, fixed typo in regex.
  ZP-1071 Added ASDevice->SetAdditionalFolderList() reusing ASDevice->AddAdditionalFolder(), added ZPushAdmin::AdditionalFolderSetList() and exposed AdditionalFolderSetList() via WebserviceDevice.
  ZP-1071 Don't warn if the folder origin can not be determined for an unmapped folderid.
  ZP-1087 Also check backend2folderidCache for generated but not (yet) synchronized short folderids when hashing.
  ZP-1080 Added log output when ignoring a folder from the fetched data.
  ZP-1080 Add debug message about the total number of folders processed in a Sync request.
  ZP-1080 Additional debug messages when processing KopanoBackend->GetHierarchy().
  ZP-1077 Removed debug log.
  ZP-1077 Added ProcessLoopDetection to catch a Ping/Sync loop where sync has errors but Ping continues to trigger syncs for it; added ProcessLoopDetection for the case where Ping sees state errors for a synched folder, triggers a sync but the folder is not being synchronized. In both cases Ping will invoke a FolderSync (status 7) instead of sending fake changes. FolderSync will check the relation between the hierarchy cache and synched data information and remove states of folders that are not in the hierarchycache anymore.
  ZP-1030 Pass $retmapimessage as value instead of as reference in ImportMessageChange.
  ZP-963 Remove PHP 7 is unsupported check from zpush.php.
  ZP-805 Update class constructors.
  ZP-805 Update class constructors.
  ZP-960 Other fatal PHP 7 errors.
  ZP-805 Renamed constructors to __construct(). And updated calls to parent class creators for classes Recurrence and TaskRecurrence. Released under the Affero GNU General Public License (AGPL) version 3.
  ZP-805 Renamed constructor BackendSearchLDAP() to __construct(). Released under the Affero GNU General Public License (AGPL) version 3.
  ZP-805 Renamed constructors  to __construct(). Updated Combined to call parent::__construct. Released under the Affero GNU General Public License (AGPL) version 3.
  ZP-805 Renamed constructor ZPushTop() to __construct(). Released under the Affero GNU General Public License (AGPL) version 3.
  ...