Some BINKP optimisation, implemented crypt, implemented receiving compressed transfers

app/Classes/File/Mail.php

@@ -15,8 +15,6 @@ class Mail extends Item
 	 */
 	public function __construct(Packet $mail,int $action)
 	{
-		$this->action |= $action;
-
 		switch ($action) {
 			case self::I_SEND:
 				$this->file = $mail;
@@ -29,6 +27,8 @@ class Mail extends Item
 			default:
 				throw new \Exception('Unknown action: '.$action);
 		}
+
+		$this->action = $action;
 	}
 
 	public function read(int $start,int $length): string