Gitlab Ticket #1651
A worker to fix existing acme renewal cronjobs by adding the dnssleep parameter
https://gitlab.gridpane.net/gp-public/server-scripts/-/issues/1651#note_101370
During testing, I noticed that cron jobs were being duplicated every time the daily worker ran.
https://gitlab.gridpane.net/gp-public/server-scripts/-/issues/1651#note_101380
Added fix to remove any duplicate cronjobs if detected.
https://gitlab.gridpane.net/gp-public/server-scripts/-/issues/1651#note_101401