Squashed commit of the following:

commit 023ffb73ce51319bc8449ccea30912bcf59ce90f
Author: reneeb <github@renee-baecker.de>
Date:   Fri May 24 11:59:29 2013 +0200

    remove unnecessary config option

commit 8e3e4449a3908a56b7771de25aa4f0b01b339688
Merge: 6c6847a bcd9596
Author: reneeb <github@renee-baecker.de>
Date:   Fri May 24 11:56:48 2013 +0200

    Merge branch 'reneeb_min_size_date_number' of github.com:reneeb/otrs into reneeb_min_size_date_number

commit 6c6847ac5170a5468cc0822a8ccd90583cf78605
Author: reneeb <github@renee-baecker.de>
Date:   Thu May 23 11:23:46 2013 +0200

    format ticket counter in ticket number generator 'date' (if enabled)

commit bcd95964feb6d14244e3529cc7b8cf6fba52f28d
Author: reneeb <github@renee-baecker.de>
Date:   Thu May 23 11:23:46 2013 +0200

    format ticket counter in ticket number generator 'date' (if enabled)
Merge branch 'master' of https://github.com/OTRS/otrs