Adds documentation to start() method.

Author: xqus

lib/phpSec/Common/Session.php

@@ -51,7 +51,10 @@ public function __construct($psl) {
   }
 
   /**
-   * Start session
+   * Start session.
+   *
+   * @param bool $regen
+   *   Regenerate session ID or not.
    */
   public function start($regen = true) {
     $this->sessIdRegen = $regen;