Custom Cron Jobs 是什么意思？

国外免费虚拟主机上有这么一段
Monthly Backups Included Included
Hotlink Protection Included Included
Account Statistcs Included Included
Dedicated IP Disabled Disabled
Fantastico Included Included
Custom Cron Jobs Disabled Disabled
AWStats Included Included
Web / FTP Stats Included Included
Latest Visitors Included Included
Raw Log Files Included Included
是什么意识??

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