Connection coalescing is the dumbest idea to ever reach RFC status. I can’t believe nobody stopped it before it got this far. It breaks everything. Thus starts my latest opinion post. What is connection coalescing? It’s specified in the RFC for HTTP/2 as connection reuse, but tl;dr: If the IP address of host A and B overlap, and host A presents a TLS cert that also includes B (via explicit CN/SAN or wildcard cert), then the client is allowed to send HTTP requests directed to B on the conn...
