[Starlink] keep the pipe full but no fuller

[Dave Taht]

Most recently Dr. Kleinrock published this analysis of BBR and the “power” metric which is a very good read

https://www.lk.cs.ucla.edu/data/files/Kleinrock/Internet%20congestion%20control%20using%20the%20power%20metric%20LK%20Mod%20aug%202%202018.pdf

and a good accompaniment to “congestion based congestion control”:

https://queue.acm.org/detail.cfm?id=3022184