Add code to recognize Ubuntu 15.10 in installer and monitor.

Till Brehm

2016-01-31 0a0647df645c2b75e136c81ff3aa99dd7c2ca05a

1
ALTER TABLE  `mail_user` ADD  `autoresponder_subject` VARCHAR(255) NOT NULL DEFAULT 'Out of office reply' AFTER  `autoresponder_end_date`;