Why Use Multiple Parameterized Classes?

When two nodes provide a part of the same or similar service, such as an IMAP frontend and an IMAP backend, it is desirable to allow them to have different configuration, while their individual configuration is generated from the same template.

One example is the :man:`imapd.conf(5)` configdir setting, which on IMAP frontends is a happy default, but is usually under the same directory hierarchy as meta- and spool-partitions.