I can confirm that 29c7787075c92ca8af353acd5301481e6f37082f applies cleanly again the latest trusty tree (3.13.0-27.50), and does indeed fix the vsftpd problem without apparent side effects.
I can confirm that 29c7787075c92ca 8af353acd530148 1e6f37082f applies cleanly again the latest trusty tree (3.13.0-27.50), and does indeed fix the vsftpd problem without apparent side effects.