Small fixes.

Squashed commit of the following:

commit 4db1ed4627ddd0d00bb995da0fbcd70cabf6f40b
Author: root <root@otrs-dev.(none)>
Date:   Fri Jul 5 04:02:47 2013 +0200

    "Ticket::Frontend::CustomerInfo*" parameters are now managed via SysConfig.

commit e023b46cc9aad2221a8c038179b538738a1e0329
Author: root <root@otrs-dev.(none)>
Date:   Fri Jul 5 03:59:27 2013 +0200

    The "Ticket::Frontend::CustomerInfoQueue" setting is obsolete.