folder stats, do folderstats comparing only if there is space in
GlobalWindowSize, do not ommit output if folder has no stat.

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

* commit 'bc067ce2':
  ZP-832 Run SyncCollections->CheckForChanges() stat comparing only on first run, improved comment.
  ZP-832 Add check if stats table can be loaded for shared users - log to INFO if that does not work, sync folders where no stat can be found only once a hour, include PR_CONTENT_COUNT, PR_CONTENT_UNREAD and PR_DELETED_MSG_COUNT into stat to reflect all kind of changes, SyncCollection->CheckForChanges() compares folderstats for changes when initiating, in case of error remove the folderstat to ensure folder is synchronized next Sync request, remove 'savestate' functionality as it is not used.
  ZP-832 Request folder statistics from the backend and setup the exporter only if the stat indicate that the folder contains changes. Per default the statistics are disabled (backend has to enable them). If disabled, an exporter will be setup for each folder.
  ZP-832 Log GlobalWindow size override only once.

first run, improved comment.

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

INFO if that does not work, sync folders where no stat can be found only
once a hour, include PR_CONTENT_COUNT, PR_CONTENT_UNREAD and
PR_DELETED_MSG_COUNT into stat to reflect all kind of changes,
SyncCollection->CheckForChanges() compares folderstats for changes when
initiating, in case of error remove the folderstat to ensure folder is
synchronized next Sync request, remove 'savestate' functionality as it
is not used.

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

Merge branch 'develop' of https://stash.z-hub.io/scm/zp/z-push into feature/ZP-832-detect-folder-changes-faster

* commit '7bdb9922':
  ZP-834 Remove SINK_FORCERECHECK configuration option and implementation.

Merge pull request #147 in ZP/z-push from bugfix/ZP-833-change-zcp-default-server-location to develop

* commit '7d7ebda7':
  ZP-833 Use http socket as default MAPI_SERVER.

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

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

only if the stat indicate that the folder contains changes. 
Per default the statistics are disabled (backend has to enable them). If
disabled, an exporter will be setup for each folder.

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 #145 in ZP/z-push from feature/ZP-818-send-no-answer-collection-for-unchanged to develop

* commit '5179ec79':
  ZP-818 Omit folder output on unchanged folders for AS 14.0 and higher.
  ZP-818 Supress collection containers if there are no changes for a folder, refactored code having the actual export and streaming of data in a private method.

Merge pull request #142 in ZP/z-push from bugfix/ZP-829-carddav-fix-phone-number-mappings to develop

* commit 'e08a6857':
  ZP-829 CardDAV mappings for phone numbers. Released under the Affero GNU General Public License (AGPL) version 3.

* commit '5ee46844':
  ZP-830 Combined; minor formatting fixes. Released under the Affero GNU General Public License (AGPL) version 3.

* commit 'dd66bfdb':
  ZP-831 Combined - typo variable name. Released under the Affero GNU General Public License (AGPL) version 3.

Merge branch 'feature/ZP-818-send-no-answer-collection-for-unchanged' into feature/ZP-832-detect-folder-changes-faster

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

ZP-831 Combined - typo variable name. Released under the Affero GNU General Public License (AGPL) version 3.

ZP-830 Combined; minor formatting fixes. Released under the Affero GNU General Public License (AGPL) version 3.

ZP-829 CardDAV mappings for phone numbers. Released under the Affero GNU General Public License (AGPL) version 3.

Merge pull request #140 in ZP/z-push from bugfix/ZP-826-ping-triggers-hierarchy-sync-when to develop

* commit '49773be6':
  ZP-826 Force synchronization of folder if there is an unknown error on exporter setup.

exporter setup.

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

Merge pull request #138 in ZP/z-push from bugfix/ZP-824-foldersync-should-cause-ping-to-force to develop

* commit 'd8718bdc':
  ZP-824 Remove local $sc as it is not needed.
  ZP-824 Invalidate all pingable flags on folders when doing a FolderSync (with changes) or FolderChange (Create, Update, Delete) operation.

Merge pull request #139 in ZP/z-push from bugfix/ZP-825-composer-replacenullchar-filter-can to develop

* commit '9c478cd5':
  ZP-825 Rename ReplaceNullCharFilter classname, register filter in WBXMLEncoder before it is being used.

Merge pull request #137 in ZP/z-push from feature/ZP-705-implement-support-for-streamer_type_stream_asplain to develop

* commit '4ccfc1f5':
  ZP-707 Remove debug.
  ZP-707 use MAPIStreamWrapper where possible.
  ZP-708 Wrap the plaintext body, html body or mime message into a StringStreamWrapper. While the wrapper correctly truncates (UTF-8 compatible), we can also truncate before loading the data in.
  ZP-707 Undo changes to the stream wrappers to be able to write at the beginning of the stream introduced with f133d268.
  ZP-706 SYNC_RESOLVERECIPIENTS_DATA is a base64 stream.
  ZP-706 Fix develop merge wrong conflict resolution.
  ZP-706 SyncMail->mimedata is a plaintext stream.
  ZP-707 Undo config changes.
  ZP-707 The stream wrapper need to truncate UTF-8 compatible.
  ZP-707 Use a MapiStreamWrapper for the AS2.5 mime message.
  ZP-707 When truncating AS12+ the general truncation size for the AS2.5 body should not be considered.
  ZP-707 Fixed instance variable access in MapiStreamWrapper.
  ZP-707 Use plain streams in mapi provider. Added writing functionality to StringStreamWrapper and MapiStreamWrapper. Reading data is encapsulated into a StringStreamWrapper by the Streamer.
  ZP-707 Initial implementation. Needs fixing.
  ZP-706 AirSyncBaseBody data is a plain data stream.

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

WBXMLEncoder before it is being used.

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

(with changes) or FolderChange (Create, Update, Delete) operation.

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 #136 in ZP/z-push from bugfix/ZP-823-do-not-sync-suggested-contacts-folder to develop

* commit '403f8afa':
  ZP-823 Remove empty line.
  ZP-823 Do not sync suggested contacts folder.

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

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

StringStreamWrapper. While the wrapper correctly truncates (UTF-8
compatible), we can also truncate before loading the data in.

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

Merge pull request #133 in ZP/z-push from feature/ZP-781-nicer-format-for-memory-usage-and to develop

* commit '673e1981':
  ZP-781 Use comma as decimal and dot as thousand separators, add 's' as unit for time usage.
  ZP-781 Nicer format for memory usage.

Merge pull request #135 in ZP/z-push from bugfix/ZP-817-pr_sensitivity-is-not-saved-for-tasks to develop

* commit '66a7ae5d':
  ZP-817 Set task as private if sensitivity is private or greater.

Merge pull request #134 in ZP/z-push from bugfix/ZP-808-research-and-review-sensitivity-for to develop

* commit 'a973c6ff':
  ZP-808 Set appointment as private if sensitivity is private or greater.

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

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