[TASK] Add SwiftMailer license exception to be included in TYPO3v4

Change-Id: Ie72691fc5146bed17e11e959081f655371bfafed
Resolves: #29802
Releases: 4.5, 4.6
Reviewed-on: http://review.typo3.org/5062
Reviewed-by: Oliver Hader
Tested-by: Oliver Hader

typo3/contrib/swiftmailer/LICENSE.TYPO3v4-Exception

+-------- Original-Message --------
+Subject: Re: LGPLv3 vs GPLv2
+Date: Thu, 08 Sep 2011 21:24:33 +0200
+From: Fabien POTENCIER <fabien.potencier@gmail.com>
+To: Ernesto Baschny <ernesto.baschny@typo3.org>
+
+Hi Ernesto,
+
+I'm willing to grant the TYPO3 project the right to include Swiftmailer
+v4 into TYPO3v4, even if it is released under the GPLv2 license.
+
+That being said, I don't know if you need something else from me as I'm
+not a lawyer either.
+
+Cheers,
+Fabien
+
+--
+Fabien Potencier
+Sensio CEO - Symfony lead developer
+sensiolabs.com | symfony.com | fabien.potencier.org
+Tél: +33 1 40 99 80 80