Update purge mail process

The purge mails 'Errors-To:' field has been set to the 'email_from'
value, instead of 'email_copy'.

Issue#121

ui/nG6/pi6/class.tx_nG6_pi6.php

@@ -207,7 +207,8 @@ class tx_nG6_pi6 extends \TYPO3\CMS\Frontend\Plugin\AbstractPlugin {
                         $subject = '[nG6 purge] No '.$purge_demand_id.' - Project '.$p[$project_id]["project_name"];
                         $headers[] = 'From: '.$GLOBALS['TSFE']->tmpl->setup["plugin."]["tx_nG6_pi6."]["email_from"];
                         //$headers[] = 'From: gerald.salin@inra.fr';
-                        $headers[] = 'Errors-To: '.$GLOBALS['TSFE']->tmpl->setup["plugin."]["tx_nG6_pi6."]["email_copy"];
+                        //$headers[] = 'Errors-To: '.$GLOBALS['TSFE']->tmpl->setup["plugin."]["tx_nG6_pi6."]["email_copy"];
+                        $headers[] = 'Errors-To: '.$GLOBALS['TSFE']->tmpl->setup["plugin."]["tx_nG6_pi6."]["email_from"];
                         $headers[] = 'X-Mailer: PHP/' . phpversion();
                         $headers[] = 'MIME-Version: 1.0';
                         $headers[] = 'Content-type: text/html; charset=utf-8';
@@ -260,7 +261,8 @@ class tx_nG6_pi6 extends \TYPO3\CMS\Frontend\Plugin\AbstractPlugin {
                         
                         $subject = '[nG6 purge / reminder] No '.$res_demand["demand_id"].' - Project '.$res_project["name"];
                         $headers[] = 'From: '.$GLOBALS['TSFE']->tmpl->setup["plugin."]["tx_nG6_pi6."]["email_from"];
-                        $headers[] = 'Errors-To: '.$GLOBALS['TSFE']->tmpl->setup["plugin."]["tx_nG6_pi6."]["email_copy"];
+                        //$headers[] = 'Errors-To: '.$GLOBALS['TSFE']->tmpl->setup["plugin."]["tx_nG6_pi6."]["email_copy"];
+                        $headers[] = 'Errors-To: '.$GLOBALS['TSFE']->tmpl->setup["plugin."]["tx_nG6_pi6."]["email_from"];
                         $headers[] = 'X-Mailer: PHP/' . phpversion();
                         $headers[] = 'MIME-Version: 1.0';
                         $headers[] = 'Content-type: text/html; charset=utf-8';