diff --git a/htdocs/core/modules/syslog/mod_syslog_file.php b/htdocs/core/modules/syslog/mod_syslog_file.php
index 34207496ea4..92a70ab3f62 100644
--- a/htdocs/core/modules/syslog/mod_syslog_file.php
+++ b/htdocs/core/modules/syslog/mod_syslog_file.php
@@ -109,7 +109,7 @@ class mod_syslog_file extends LogHandler implements LogHandlerInterface
 	    if (empty($conf->global->SYSLOG_FILE)) $tmp=DOL_DATA_ROOT.'/dolibarr.log';
 	    else $tmp=str_replace('DOL_DATA_ROOT', DOL_DATA_ROOT, $conf->global->SYSLOG_FILE);
 
-	    if (! empty($conf->global->SYSLOG_FILE_ONEPERSESSION))
+	    if (! empty($conf->global->SYSLOG_FILE_ONEPERSESSION))	// file depend on session name that is same for all user, not per user value of the session id
 	    {
 	        $suffixinfilename = '_'.session_name();
 	    }
diff --git a/htdocs/main.inc.php b/htdocs/main.inc.php
index 07779a02392..c165d39bcbc 100644
--- a/htdocs/main.inc.php
+++ b/htdocs/main.inc.php
@@ -215,8 +215,8 @@ $sessiontimeout='DOLSESSTIMEOUT_'.$prefix;
 if (! empty($_COOKIE[$sessiontimeout])) ini_set('session.gc_maxlifetime',$_COOKIE[$sessiontimeout]);
 session_name($sessionname);
 session_set_cookie_params(0, '/', null, false, true);   // Add tag httponly on session cookie (same as setting session.cookie_httponly into php.ini). Must be called before the session_start.
-// This create lock released until session_write_close() or end of page.
-// We need this lock as long as we read/write $_SESSION ['vars']. We can close released when finished.
+// This create lock, released when session_write_close() or end of page.
+// We need this lock as long as we read/write $_SESSION ['vars']. We can remove lock when finished.
 if (! defined('NOSESSION'))
 {
 	session_start();
@@ -1260,19 +1260,6 @@ function top_htmlhead($head, $title='', $disablejs=0, $disablehead=0, $arrayofjs
 				print '<script type="text/javascript" src="'.DOL_URL_ROOT.'/core/js/editinplace.js'.($ext?'?'.$ext:'').'"></script>'."\n";
 				print '<script type="text/javascript" src="'.DOL_URL_ROOT.'/includes/jquery/plugins/jeditable/jquery.jeditable.ckeditor.js'.($ext?'?'.$ext:'').'"></script>'."\n";
 			}
-			// jQuery DataTables
-			/* Removed a old hidden problematic feature never used in Dolibarr. If an external module need datatable, the module must provide all lib it needs and manage version problems with other dolibarr components
-            if (! empty($conf->global->MAIN_USE_JQUERY_DATATABLES) || (defined('REQUIRE_JQUERY_DATATABLES') && constant('REQUIRE_JQUERY_DATATABLES')))
-            {
-                print '<script type="text/javascript" src="'.DOL_URL_ROOT.'/includes/jquery/plugins/datatables/media/js/jquery.dataTables.min.js'.($ext?'?'.$ext:'').'"></script>'."\n";
-                print '<script type="text/javascript" src="'.DOL_URL_ROOT.'/includes/jquery/plugins/datatables/extensions/Buttons/js/dataTables.buttons.min.js'.($ext?'?'.$ext:'').'"></script>'."\n";
-                print '<script type="text/javascript" src="'.DOL_URL_ROOT.'/includes/jquery/plugins/datatables/extensions/Buttons/js/buttons.colVis.min.js'.($ext?'?'.$ext:'').'"></script>'."\n";
-                print '<script type="text/javascript" src="'.DOL_URL_ROOT.'/includes/jquery/plugins/datatables/extensions/Buttons/js/buttons.html5.min.js'.($ext?'?'.$ext:'').'"></script>'."\n";
-                print '<script type="text/javascript" src="'.DOL_URL_ROOT.'/includes/jquery/plugins/datatables/extensions/Buttons/js/buttons.flash.min.js'.($ext?'?'.$ext:'').'"></script>'."\n";
-                print '<script type="text/javascript" src="'.DOL_URL_ROOT.'/includes/jquery/plugins/datatables/extensions/Buttons/js/buttons.print.min.js'.($ext?'?'.$ext:'').'"></script>'."\n";
-                print '<script type="text/javascript" src="'.DOL_URL_ROOT.'/includes/jquery/plugins/datatables/extensions/ColReorder/js/dataTables.colReorder.min.js'.($ext?'?'.$ext:'').'"></script>'."\n";
-                print '<script type="text/javascript" src="'.DOL_URL_ROOT.'/includes/jszip/jszip.min.js"></script>'."\n";
-            }*/
             // jQuery Timepicker
             if (! empty($conf->global->MAIN_USE_JQUERY_TIMEPICKER) || defined('REQUIRE_JQUERY_TIMEPICKER'))
             {