* 'VirtualMailManager/Exceptions.py'
    - VMMNotRootException.__init__() calls parent CTor
* 'VirtualMailManager/VirtualMailManager.py'
    - activated check for missing sections/options
* 'VirtualMailManager/constants/ERROR.py'
    - added CONF_* constants from EXIT.py
    - renumbered
* 'VirtualMailManager/constants/EXIT.py'
    - moved CONF_* constants to ERROR.py
* 'VirtualMailManager/Config.py'
    - implemented VMMConfig.check()
    - some code cleanups
* 'vmm'
    - some code cleanups
# $Id$
- general
    - add transport to user tbl (per account) / fall back transport via dom tbl
    - make default transport configurable via vmm.cfg (for domains and
      accounts
    - write manpages
- vmm
    - add support for relocated_map
- VirtualMailManager/Alias.py
    - check if account exists, when destination is in the same domain