VMM/Handler: renamed some methods and added their missing docstrings:
- cfgDget() -> cfg_dget()
- cfgPget() -> cfg_pget()
- userByID() -> user_by_uid()
# 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=postfixpassword=some_password# The database name on the servers.dbname=mailsys# The SQL query template used to search the databasequery=SELECTtransportFROMpostfix_transportWHEREaddress='%s'