--cdg > --bwlimit

I long ago posted patches to the rsync folk that would allow it to use alternate congestion control algorithms and diffserv. The patches sat in their patchwork for a while and got improved a bit, but I don't think they ever made their mainline tree.

The initial patches were here:

https://lists.samba.org/archive/rsync/2011-November/02711...

As rsync is often tunneled over ssh, I have long thought we could add stuff to ssh to better chose it's underlying cc, also.