F6289: First runnable version to show the formLog. Log is still empty (nothing submitted). 'per session' / 'all' not implemented.

Manual.rst: usage of drag and drop.

Change getMimeType() in Report in case file is missing or `file` beaks: instead to throw an exception, an empty string is returned.

Feature 5425 / thumbnail: rewrite - secure thumbnails are now rendered on first access, not when 'AS _thumbnail' is called.

Link.php: SIP Links get automatically parameter '__dbIndexData'
Report.php: can select DB via 'dbIndex' directive (global)
AbstractBuildForm.php: dbIndexData now based on setting in Form (before on config.qfq.ini)
formEditor.sql: FormEditor update on Form 'form' and 'formElements'

Feature 5425 / thumbnail: rewrite - secure thumbnails are now rendered on first access, not when 'AS _thumbnail' is called.

Bug #5348 / Exception/Report: level key missing - Remove outdated report exception classes from File 'Error.php'

Store.php, AbstractBuildForm.php, QuickFormQuery.php, Save.php: change signature of appendToStore() to be eqal to setStore().
Unittests for appendToStore.php

sendMail refactored - AutoCron.php,Report.php,SendMail.php: SENDMAIL_IDX_* replaced by SENDMAIL_TOKEN_*

SendMail.php: renamed file and class from 'sendmail' to 'sendMail'. Remove obsolete function buildHeader().
AutoCron.php: Update use of class sendMail().
FormAction.php: rename function sendmail(0 to doSendMail().
Report.php: remove unnecessary code. Move sendmailConvertToken() to class sendMail / parseStringToArray().

Manual.rst: sendMailToken 'f' changed from  'f' to 'F'.
Download.php, Linnk.php: TOKEN_FILE_DEPRECATED
Sendmail.php: broken, in the middle of work

Manual.rst: describe new option altsql, shead, stail
Report.php: implement altsql, shead, stail.

Report.php: 'line.count' general available per row. 'line.insertId'. RBGD moved inside of processing result. Replace variables in RBEG.
Variables.php: RegExp changed from 'all variables in double curly braces' to 'line.varname' - the other variables are replaced in eval.
Evaluate.php: Fixed problem that 'Dropdown Select' with '{{! SE...' not recognized.

 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

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.

Manual.rst: some short docs.
Support.php: add stripFirstCharIf()
Report.php: merge STORE_RECORD