Some things must pull *all* apps vs filtered apps (mostly things that write out config files or install triggers). Using an unflitered list is best.
Also, we default to filtering, which should be what most usage needs.
RHEL blocks users from executing crontab as themselves Because Of Reasons so we need to use sudo instead.
Also refactors file writing to properly support writing the permissions on sudoers files going forward.
Closes#5020
These flags are not commonly invoked by users, causing issues when cleaning up old containers. Rather than instruct users to use some random flag, just change the default to what is likely to be more common.
There was a missing placeholder in the template string.
That caused that `%!(EXTRA string=...` is added to the crontab file which causes commands to fail.
This allows alternative plugins - such as dokku-letsencrypt - to inject scheduled cron tasks into the cron system used by Dokku. Cron systems can choose to include or not include a cron task based on the specified scheduler, and can also optionally use a third parameter to store arbitrary information.
This functionality enables users to manage a global crontab for the Dokku user that contains all scheduled tasks across all apps. Alternative schedulers can implement cron tasks as desired.
