[security] import pages xss prevention (#6553)

app/access_controls/access_control_import.php

@@ -164,7 +164,7 @@
 			//loop through the lines and fields
 			$x = 0;
 			foreach ($line_fields as $line_field) {
-				$line_field = trim(trim($line_field), $enclosure);
+				$line_field = trim(escape(trim($line_field)), $enclosure);
 				echo "<tr>\n";
 				echo "	<td width='30%' class='vncell' valign='top' align='left' nowrap='nowrap'>\n";
 				echo $line_field;