Feature request - bwlimit?

[Dan Young]

As we make the transition from rsync to rdiff-backup for "live" backups 
here in Parkrose School District, there's basically only thing I miss.

This is the --bwlimit=x (where x is the bandwidth cap in kb) argument 
for rsync. Very useful for backing up during the day w/o killing our WAN 
connection to the backup server which is at another site.

Still, we're happy campers. Thanks for the spiffy tool!

-Da