Make backup_copies configurable
Currently backup_copies is hard coded with a maximum of 10, ideally this needs to be configurable. We have clients who like to keep 2 weeks of backups (14 copies) or 3 weeks (21 copies), or something more than 10.
Meaning we have to manually edit the cron daily script to allow up to 21 copies (script /usr/local/ispconfig/server/cron_daily.php, around lines 1198 and 1398) As this script only allows up to 10 copies (and fails to delete older backups if backup_copies is increased over 10). Also the interface needs to be manually edited to allow the drop down for backup_copies to be increased.
Would be great if max backup_copies could be configurable in the main system config.