Merge pull request #692 in ZP/z-push from bugfix/ZP-250-meta-ticket-for-documentation-typo-and-similar-fixes to develop

* commit '1784c315':
  ZP-250 Improve log messages in readPropStream.

Merge pull request #695 in ZP/z-push from bugfix/ZP-1411-unset-undefined-properties-for-tasks to develop

* commit '8f7f3045':
  ZP-1411 Unset undefined properties for tasks.

Merge pull request #694 in ZP/z-push from bugfix/ZP-1410-imap-backend-to-provide-user-details-for-caldav to develop

* commit '5ed1579f':
  ZP-1410 Dot at the end of sentences. Released under the Affero GNU General Public License (AGPL) version 3.
  ZP-1410 IMAP backend to provide user details for CalDAV backend. Released under the Affero GNU General Public License (AGPL) version 3.

* commit 'a30be1d3':
  ZP-1408 Don't log a warning when a user does not enter a subject. Released under the Affero GNU General Public License (AGPL) version 3.

Merge pull request #687 in ZP/z-push from feature/ZP-1372-folder-re-sync-is-triggered-on-deletions-ratio-threshold to develop

* commit '8f1414f0':
  ZP-1372 PHP doc fix - added a dot at the end of the sentence.
  ZP-1372 Created getter ZPush::GetDeviceManager()->GetDevid() , resumed SYNC_STATUS_INVALIDSYNCKEY for triggering a folder resync. Released under the Affero GNU General Public License (AGPL) version 3.
  ZP-1372 Removed logging deviceid. Code style changes.
  ZP-1372 Moved 'Not Triggering folder re-sync' message to INFO level. Released under the Affero GNU General Public License (AGPL) version 3.
  ZP-1372 Folder re-sync is triggered on deletions ratio threshold. Released under the Affero GNU General Public License (AGPL) version 3.

Merge pull request #691 in ZP/z-push from bugfix/ZP-1401-in-gab2contacts-also-sync-kopano-contacts to develop

* commit '031ea3a8':
  ZP-1401 Sync Kopano contacts with gab2contacts.

Merge pull request #689 in ZP/z-push from bugfix/ZP-1399-wrong-state-and-log-folder-permissions-for-rhel-based-system to develop

* commit '3982b5b1':
  ZP-1399 Wrong state and log folder permissions for RHEL based systems.

Merge pull request #688 in ZP/z-push from bugfix/ZP-1398-z-push-admin-do-not-call-device--gethierarchycache-in-loop to develop

* commit '794f4f7a':
  ZP-1398 Do not call $device->GetHierarchyCache() in loop.

* commit '0fe37605':
  ZP-1396 Only a meeting if meetingstatus says so. Released under the Affero GNU General Public License (AGPL) version 3.

* commit '1ca26262':
  ZP-1386 Update mimedecode include. Released under the Affero GNU General Public License (AGPL) version 3.

* commit 'ed406f1e':
  ZP-1391 Support disabling multiple IMAP auth methods, log the disabled methods. Released under the Affero GNU General Public License (AGPL) version 3.
  ZP-1391 Allow disabling the GSSAPI authenticator. Released under the Affero GNU General Public License (AGPL) version 3.

Released under the Affero GNU General Public License (AGPL) version 3.

ZP-1410 Dot at the end of sentences. Released under the Affero GNU General Public License (AGPL) version 3.

ZP-1410 IMAP backend to provide user details for CalDAV backend. Released under the Affero GNU General Public License (AGPL) version 3.

ZP-1408 Don't log a warning when a user does not enter a subject. Released under the Affero GNU General Public License (AGPL) version 3.

Released under the Affero GNU General Public License (AGPL) version 3.

ZP-1372 Created getter ZPush::GetDeviceManager()->GetDevid() , resumed SYNC_STATUS_INVALIDSYNCKEY for triggering a folder resync. Released under the Affero GNU General Public License (AGPL) version 3.

Released under the Affero GNU General Public License (AGPL) version 3.

Released under the Affero GNU General Public License (AGPL) version 3.

Merge pull request #690 in ZP/z-push from bugfix/ZP-1400-picture-not-saved-for-a-contact-created-on-mobile to develop

* commit 'c830684e':
  ZP-1400 Picture not saved for a contact created on mobile.

Released under the Affero GNU General Public License (AGPL) version 3.

Released under the Affero GNU General Public License (AGPL) version 3.

Released under the Affero GNU General Public License (AGPL) version 3.

Released under the Affero GNU General Public License (AGPL) version 3.

Merge pull request #684 in ZP/z-push from bugfix/ZP-1369-impersonation-replyback-notification-mail-can-not-get-folder-name to develop

* commit 'c2a8a35e':
  ZP-1369 Get foldername from MAPI when impersonating.

ZP-1396 Only a meeting if meetingstatus says so. Released under the Affero GNU General Public License (AGPL) version 3.

Released under the Affero GNU General Public License (AGPL) version 3.

ZP-1372 Moved 'Not Triggering folder re-sync' message to INFO level. Released under the Affero GNU General Public License (AGPL) version 3.

ZP-1372 Folder re-sync is triggered on deletions ratio threshold. Released under the Affero GNU General Public License (AGPL) version 3.

ZP-1386 Update mimedecode include. Released under the Affero GNU General Public License (AGPL) version 3.

ZP-1391 Support disabling multiple IMAP auth methods, log the disabled methods. Released under the Affero GNU General Public License (AGPL) version 3.

Merge branch 'bugfix/ZP-1391-imap-disable-gssapi' of https://stash.z-hub.io/scm/zp/z-push into bugfix/ZP-1391-imap-disable-gssapi

ZP-1391 Allow disabling the GSSAPI authenticator. Released under the Affero GNU General Public License (AGPL) version 3.

The php-imap module does not support proper fallback from GSSAPI to
other authentication methods (such as PLAIN). This causes the IMAP
backend to be non-functional when connecting to a GSSAPI-enabled IMAP
server (users will be unable to log in).
Since there is no fix available for the php-imap bug, this change
introduces a IMAP_DISABLE_AUTHENTICATOR setting that can be used to
manually disable GSSAPI support in the imap module.

Cf.: https://github.com/barbushin/php-imap/issues/19

Merge pull request #678 in ZP/z-push from bugfix/ZP-1392-default-backend-warning-about-non-existing-userinformation to develop

* commit '53ebb0f6':
  ZP-1392 Fix SyncUserInformation for default backend. Released under the Affero GNU General Public License (AGPL) version 3.

ZP-1392 Fix SyncUserInformation for default backend. Released under the Affero GNU General Public License (AGPL) version 3.

Merge pull request #669 in ZP/z-push from bugfix/ZP-1377-undefined-index-warnings-in-imap-backend to develop

* commit '69c08ccd':
  ZP-1377 Fix undefined index warnings in imap backend.

Merge pull request #674 in ZP/z-push from bugfix/ZP-1383-carddav-last-character-of-note-trimmed to develop

* commit '5be4d255':
  ZP-1383 Fix carddav last character of note trimmed. Released under the Affero GNU General Public License (AGPL) version 3.

ZP-1383 Fix carddav last character of note trimmed. Released under the Affero GNU General Public License (AGPL) version 3.

Merge pull request #673 in ZP/z-push from feature/ZP-1382-caldav-out-of-office-tentative-workingelsewhere-status to develop

* commit '8608d3f9':
  ZP-1382 Caldav outofoffice tentative workingelsewhere status. Released under the Affero GNU General Public License (AGPL) version 3.

ZP-1382 Caldav outofoffice tentative workingelsewhere status. Released under the Affero GNU General Public License (AGPL) version 3.