* scripts/hcoop-backup: (BWLIMIT): New var indicating KB/s bandwidth
limiting to enforce.
(BACKUPTMP): Place backups here individually on local disk before
transferring offsite. Make this the current directory rather than the
offsite AFS directory.
(copy_over): New convenience function that copies a file from the local
backup location to the offsite location, removing the original.
(complain): Make complaint email come from "The Backup Program".