VMM/{Alias,Handler}: reworked Alias class, adjusted Handler class.
Handler:
- attribute _dbh is no longer private, the VMM/cli/Handler uses it also.
- adjusted to changes in Alias and EmailAddress classes.
# 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=SELECTmaildirFROMpostfix_maildirWHEREaddress='%s'