Enable Parsedown Safe-Mode

Also remove the setUrlsLinked(false) so that we can haz urls

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

app/classes/Framadate/Utils.php

@@ -148,7 +148,8 @@ class Utils {
         $parseDown
             ->setMarkupEscaped(true)
             ->setBreaksEnabled(true)
-            ->setUrlsLinked(false);
+            ->setSafeMode(true)
+            ;
 
         if ($line) {
             $html  = $parseDown->line($md);