Name: sync_port
Type: STRING
Default-Value: NULL
Last-Modified: 3.0.0

Name of the service (or port number) of the replication service on replica
host.  Prefix with a channel name to only apply for that channel.  If not
specified, and if sync_try_imap is set to "yes" (the default), then the
replication client will first try "imap" (port 143) to check if imapd
supports replication.  Otherwise it will default to "csync" (usually port
2005).
