logrotate @3.8.6_2 enhance startup item for hourly directive

[nonstop.server@…]

Enhance the example launchd plist to grant users the option to use the hourly directive.

hourly Log files are rotated every hour. Note that usually logrotate is
       configured to be run by cron daily. You have to change this con-
       figuration  and run logrotate hourly to be able to really rotate
       logs hourly.

The proposed patch has also two other changes, namely two added keys, LowPriorityIO and Nice which are used in the plist for newsyslogd.

LowPriorityIO <boolean>
     This optional key specifies whether the kernel should consider this daemon to be low
     priority when doing file system I/O.
Nice <integer>
     This optional key specifies what nice(3) value should be applied to the daemon.

[nonstop.server@…]

proposed patch

[pixilla (Bradley Giesbrecht)]

This being an example file I am unsure how removing the StartCalendarInterval Hour directive is a better example. Do your StartCalendarInterval changes represent a more common use case?

The LowPriorityIO and Nice directives could be helpful to the user.

[nonstop.server@…]

Replying to pixilla@…:

Your right it is not a better example by removing the Hour directive, but maybe it would be helpful to add a comment about the hourly option.
Something like:

"You have to remove the Hour directive to run logrotate hourly and be able to really rotate logs hourly."

[mf2k (Frank Schima)]

See #57827

[ctreleaven (Craig Treleaven)]

Users are free to edit the example launchd plist to any setting they want.