Name: sync_log_channels
Type: STRING
Default-Value: NULL
Last-Modified: 2.5.0

If specified, log all events to multiple log files in directories specified
by each "channel".  Each channel can then be processed separately, such as
by multiple sync_client(8)s in a mesh replication scheme, or by squatter(8)
for rolling search index updates.

You can use "" (the two-character string U+22 U+22) to mean the default
sync channel.
