Alt-Svc header browser support info: consider adding

[msample]

https://tools.ietf.org/rfc/rfc7838
Abstract

This document specifies "Alternative Services" for HTTP, which allow
an origin's resources to be authoritatively available at a separate
network location, possibly accessed with a different protocol
configuration.

[praisedpk]

Still cannot see related information on caniuse... Any chance?

[mqudsi]

Chrome status: https://www.chromestatus.com/feature/5754540846481408

Enabled by default (tracking bug) in:

Chrome for desktop release 52
Chrome for Android release 52
Android WebView release 52

Firefox support for http2 alt-svc frames: https://bugzilla.mozilla.org/show_bug.cgi?id=1003448 (implemented)
I can't find the issue for alt-svc header support in Firefox, but it's supported as well.

The listing for this needs to have at least three components, one for alt-svc header support (for http/1.1), one for alt-svc frame support (for http2), and one for alt-used in responses from client to alternate origins.

[Schweinepriester]

Available via MDN now: https://caniuse.com/mdn-http_headers_alt-svc

[Fyrd]

The MDN data's a bit light on support data so leaving this open for now.