Multiple HTTP/2 DoS flaws found by Netflix

Netflix has identified several denial of service (DoS) flaws in HTTP/2, a popular network protocol that underpins large parts of the web. Exploiting them could bring servers grinding to a halt.
This is a companion discussion topic for the original entry at https://nakedsecurity.sophos.com/2019/08/19/netflix-finds-multiple-http2-dos-flaws/