users: fixing (invisible) warnings during vacation changes due to missing config.php
users: out-of-office: switch from vacation.php to zarafa-set-oof (fork) to avoid php/zarafa incompatibilities
users: out-of-office: fix umlaut problems (enforce UTF-8)
users: out-of-office: fixing error handling
users: out-of-office: fix label umlauts
users: out-of-office: improve error handling
users: out-of-office: fix empty out-of-message
fixing missing dependency on perl(Switch)/libswitch-perl

https://forums.zarafa.com/showthread.php?10749-Z-Admin-and-Ubuntu-14-04&p=47257&viewfull=1#post47257
ADM-415: Hostname config fails on Ubuntu 14.04
yaffas-zarafa postinst: ubuntu 14.04 compatibility (apache config)