VMM/Config: reworked configuration handling. Implemented LazyConfig(RawConfigParser) and LazyConfigOption(object) Rewrote Config class: * use default values and added some validation stuff * removed attributes: __VMMsections and __changes * replaced methods __chkSections() and __chkOptions() with __chkCfg VMM/VMM: Adjusted to reworked Config class. * removed attribute __cfgSections * removed methods: cfgGetBoolean(), cfgGetInt(), cfgGetString() * added methods: cfgDget(), cfgPget(), cfgSet() VMM/__init__: added function get_unicode() vmm: Adjusted to replaced methods in VMM/VMM.

Config
   cfs - configset sect.opt val
   cfg - configget sect.opt

   ds - domainservices: smtp pop imap sieve???

- Aliases
    - avoid looping aliases

- Domain
    - optional limits for number of:
        + accounts
        + aliases
        + destinations/alias
        + alias domains