---- Changes since 1.130 ----
Environment variables can be edited in user Cron files, and jobs and variable settings moved around.
---- Changes since 1.170 ----
Added option to move an existing environment variable to the top of a user's list.
---- Changes since 1.190 ----
Added a module configuration option to display the schedule for each job on the main page.
Added another option to display the current running status of each job.
---- Changes since 1.220 ----
In addition to the normal method of specifying the times that a cron job runs at, a date range can now also be entered.
---- Changes since 1.230 ----
Added a field for entering comments from Cron jobs, and a Module Config option to display comments in the list.
---- Changes since 1.240 ----
Multiple Cron jobs can be deleted at once, using checkboxes on the module's main page.
---- Changes since 1.250 ----
Multiple Cron jobs can be enabled or disabled at once, in a similar way to many can be deleted.
---- Changes since 1.290 ----
Changed the default schedule for new jobs to hourly.
---- Changes since 1.300 ----
When a user's home directory is changed in the Users and Groups module, any Cron jobs that use the old path are updated to the new.
---- Changes since 1.350 ----
Added a button on the Edit Job page for cloning an existing job.
---- Changes since 1.370 ----
Added a Module Config option to limit Cron jobs to hourly at most, thanks to Filip Hajny.
---- Changes since 1.390 ----
If there are more than 100 jobs (by default), a search form is shown on the main page instead of a list of all jobs.
Re-wrote all user interface code to use the new Webmin UI library.
Handle the daily / monthly / weekly Cron specification used on Ubuntu 7.
