Note from 3 July 2020
@bagder hi Daniel, reading https://daniel.haxx.se/blog/2016/08/18/http2-connection-coalescing/ (yes, I'm late 😅)
If DNS B.example.com returns
192.168.0.3, is TLS really enough to be sure it also works on
BTW, there's a typo near the end: "both IPv4 and IPv4 addresses".