General error: fix problem with unitialised variable. Update manual.

extension/Documentation/Manual.rst

@@ -350,7 +350,7 @@ Extension Manager: QFQ Configuration
 | documentation                 | http://docs.typo3.org...                              | Link to the online documentation of QFQ. Every QFQ installation also       |
 |                               |                                                       | contains a local copy: typo3conf/ext/qfq/Documentation/html/Manual.html    |
 +-------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
-| flagProduction                | yes                                                   | yes|no: might be used to differentiate the installation                    |
+| flagProduction                | yes                                                   | yes|no: used to differentiate production and development site.             |
 +-------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+
 | thumbnailDirSecure            | fileadmin/protected/qfqThumbnail                      | Important: secure directory 'protected' (recursive) against direct access. |
 +-------------------------------+-------------------------------------------------------+----------------------------------------------------------------------------+

extension/Source/core/report/SendMail.php

@@ -69,10 +69,10 @@ class SendMail {
         if (!empty($redirectAllMail)) {
 
             $addBody = "All QFQ outgoing mails are caught and redirected to you." . PHP_EOL . "Original receiver(s) are ..." . PHP_EOL;
-            $addBody .= 'TO: ' . $mailConfig[SENDMAIL_TOKEN_RECEIVER] . PHP_EOL;
-            $addBody .= 'CC: ' . $mailConfig[SENDMAIL_TOKEN_RECEIVER_CC] . PHP_EOL;
-            $addBody .= 'BCC: ' . $mailConfig[SENDMAIL_TOKEN_RECEIVER_BCC] . PHP_EOL;
-            $addBody .= 'SENDER: ' . $mailConfig[SENDMAIL_TOKEN_SENDER] . PHP_EOL;
+            $addBody .= 'TO: ' . $mailConfig[SENDMAIL_TOKEN_RECEIVER]??'' . PHP_EOL;
+            $addBody .= 'CC: ' . $mailConfig[SENDMAIL_TOKEN_RECEIVER_CC]??'' . PHP_EOL;
+            $addBody .= 'BCC: ' . $mailConfig[SENDMAIL_TOKEN_RECEIVER_BCC]??'' . PHP_EOL;
+            $addBody .= 'SENDER: ' . $mailConfig[SENDMAIL_TOKEN_SENDER]??'' . PHP_EOL;
             $addBody .= PHP_EOL . "==========================================" . PHP_EOL . PHP_EOL;
 
             // Check if the given body is a HTML body.

extension/ext_conf_template.txt

 # cat=config/config; type=string; label=URL QFQ Documentation:Default is 'https://docs.typo3.org/typo3cms/drafts/github/T3DocumentationStarter/Public-Info-053/Manual.html'. Might be changed to a local repo. Every QFQ installation contains a local copy: <site path>/typo3conf/ext/qfq/Documentation/html/Manual.html (corresponds always to the QFQ version).
 documentation = https://docs.typo3.org/typo3cms/drafts/github/T3DocumentationStarter/Public-Info-053/Manual.html
 
-# cat=config/config; type=string; label=Marks a production installation:Possible values: 'yes', 'no'. Default is 'yes'. Used to differentiate between development & production systems.
+# cat=config/config; type=string; label=Marks a production installation:Possible values: 'yes', 'no'. Retrieve via '{{flagProduction:Y}}''.  Default is 'yes'. Used to differentiate between development & production systems.
 flagProduction = yes
 
 # cat=config/config; type=string; label=Thumbnail directory 'secure':Default is 'fileadmin/protected/qfqThumbnail'. Important: secure the directory (recursive) against direct access. Will be used by a special columnname '_thumbnail'.