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.
# All parameters are described in pgsql_table(5) / PGSQL PARAMETERS
#
# The hosts that Postfix will try to connect to and query from.
hosts = localhost
# The user name and password to log into the pgsql server.
user = postfix
password = some_password
# The database name on the servers.
dbname = mailsys
# XXX see create_optional_types_and_functions.pgsql
# * line 9: type sender_login
# * line 26: function postfix_smtpd_sender_login_map + comment above
#
# The SQL query template used to search the database
#query = SELECT login FROM postfix_smtpd_sender_login_map('%u', '%d')