I could have outdated information; in either case speed isn't as important as security. Why haven't servers started advertising how many connections they are w

I could have outdated information; in either case speed isn't as important as security. Why haven't servers started advertising how many connections they are willing to accept? The need for other domains could be easily removed with something like an HTTP response header: 200 Ok ... X-Max-Parallel-Connection: 10 ... This type of header could even be used to give per-page values: X-Max-Parallel-Connection: 20, scope=local-page-only (there's probably a better way to phrase these, but that works as an example) Yes, I know these are not supported by browsers yet, but sensibility is one of the best features of HTTP.