Fixes #3992 (Feature): dbNameQfq & dbNameData already implemented. dbNameT3 renamed from T3_DB_NAME. No more configuration in config.qfq.php necessary. Manual updated.
AbstractException.php: fixes access to uninitialized array elements.
Download.php: get dbT3 now from STORE_SYSTEM
Config.php: read 'dbNameT3' from TYPO3_CONF_VARS or from T3 config file.
QuickFormQuery.php: refactor gathering 'dbNames' - now from config.qfq.php. Fixes bug in getForwardMode() for QFQ inline editing.

F4906 Php Session Timeout: can be specified globally in configuration and per form. Affects only logged in FE User.

Config.qfq: central defaults for DATA_MATH, DATA_ERROR

F5458 Error Log Unique Identifier: Exception message might be an ordinary string or a JSON encoded array.

Bug #5924: change include_once() against include() - second call to include_once just returned 'true'.

Bug #5924 / config.qfq.ini/LocalConfiguration.php: der FormEditor nur mit 'dbIndexData = 1' in config.qfq.ini - several places in formEditor.sql still contained the 'dbIndex...' instead of 'index...'. fixed.

Bug #5890 config.qfq.ini: migrate LDAP credentials too. Extend T3 internal qfq config with 30 'custom'-vars. This replaces the old custom vars in config.qfq.ini

Bug #5890 config.qfq.ini is public readable. Renamed file to config.qfq.php. Implement a basic migration assistant to copy DB credentials to new config.qfq.php. All other values have to be copied to extmanager/qfq-configuration manually.

HelperFormElement.php, SessionCookie.php, Html2Pdf.php, Store.php, Constants.php: migrate to camel case on configuration variables.
Config.php: readConfig() reads now config.qfq.ini and T3 LocalConfiguration.php.

Fix PHPUnit tests

Reformat manual for config.qfq.ini. Copy config.qfq.example.ini to MANUAL.rst. Migrate config defaults from setIfNotSet() to array_merge().

 Manual.rst: description of new options for MAIL_LOG and Report/sendmail.
 sendEmail: added new perl script.
 Report.php: $mailarr renamed to $mailConfig. convertToken() updated.
 Sendmail.php: commented mb_send_mail(). New sendEmail().
 Config.php: new options MAIL_LOG.
 Store.php: Update SUSTEM_SEND_E_MAIL

phpUnitTests: fixed some defintions of string/int

OnArray.php: new function keyNameRemoveLeadingUnderscore().
Report: Introduce constant TOKEN_COLUMN_CTRL.
Config.php: Implement function 'checkDeprecated().
Store.php: Update StoreSystemUpdate() to handle up to 3 FILL_STORE_SYSTEM_SQL_x. Implement an optional error message together with a full stop.

Bug reading config.qfq.ini: PHP replaces 'yes' and 'no' by '1' and '0'. Revert this for SYSTEM_SHOW_DEBUG_INFO.

DatabaseUpdateData.php: removed the DB update from last commit - not necessary.
Config.php: New default 'm'
Evaluate.php: Respect EscapeTypeDefault in form definition.
QuickFormQuery.php: Replace 'EscapeTypeDefault' in form defintion very early.

Implemented setting 'db_?_xxx' in config.qfq.ini and QuickFormQuery.php and other files. Open: saving in  DB_INDEX_QFQ.