Add log rolling by time.
Enable log rolling by time; not currently supported by the configuration file "logging" command.
Add command channel "closelog" to call existing routine isc_log_closefilelogs. Invoking this command from a cron job will enable the sysadmin to roll logs by time. I have used (versions of) the attached patch for years due to the lack of this feature with no problems. (Patch applies cleanly to bind-9.16.27.) bind9.patch