By default, this is the current working directory.
--keep <NUM> Keep at most *NUM* versions of any zone.
By default, 20 versions are kept.
---uid <UID> Drop effective user-id to *UID* after binding the listen sockets
---gid <GID> Drop effective group-id to *GID* after binding the listen sockets
+--uid <UID> Drop effective user-id to *UID* after binding the listen sockets.
+--gid <GID> Drop effective group-id to *GID* after binding the listen sockets.
+--axfr-timeout <NUM> Stop an inbound AXFR when it is not completed in *NUM* seconds. Defaults to 10 seconds.
+--tcp-out-threads <NUM> Amount of worker threads to handle TCP traffic.
+ This limits the number of concurrent AXFR/IXFR, the default is 10.
See also
--------