HTTP2.md: add CURL_HTTP_VERSION_2TLS and updated alt-svc link
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		| @@ -37,6 +37,9 @@ If `CURLOPT_HTTP_VERSION` is set to `CURL_HTTP_VERSION_2_0`, libcurl will use | |||||||
| ALPN (or NPN) to negotiate which protocol to continue with. Possibly introduce | ALPN (or NPN) to negotiate which protocol to continue with. Possibly introduce | ||||||
| an option that will cause libcurl to fail if not possible to use HTTP/2. | an option that will cause libcurl to fail if not possible to use HTTP/2. | ||||||
|  |  | ||||||
|  | `CURL_HTTP_VERSION_2TLS` was added in 7.47.0 as a way to ask libcurl to prefer | ||||||
|  | HTTP/2 for HTTPS but stick to 1.1 by default for plain old HTTP connections. | ||||||
|  |  | ||||||
| ALPN is the TLS extension that HTTP/2 is expected to use. The NPN extension is | ALPN is the TLS extension that HTTP/2 is expected to use. The NPN extension is | ||||||
| for a similar purpose, was made prior to ALPN and is used for SPDY so early | for a similar purpose, was made prior to ALPN and is used for SPDY so early | ||||||
| HTTP/2 servers are implemented using NPN before ALPN support is widespread. | HTTP/2 servers are implemented using NPN before ALPN support is widespread. | ||||||
| @@ -99,7 +102,7 @@ same origin server that you get the response from. A browser or long-living | |||||||
| client can use that hint to create a new connection asynchronously.  For | client can use that hint to create a new connection asynchronously.  For | ||||||
| libcurl, we may introduce a way to bring such clues to the applicaton and/or | libcurl, we may introduce a way to bring such clues to the applicaton and/or | ||||||
| let a subsequent request use the alternate route | let a subsequent request use the alternate route | ||||||
| automatically. [Spec](https://tools.ietf.org/html/draft-ietf-httpbis-alt-svc-05) | automatically. [Spec](https://tools.ietf.org/html/draft-ietf-httpbis-alt-svc-14) | ||||||
|  |  | ||||||
| TODO | TODO | ||||||
| ---- | ---- | ||||||
|   | |||||||
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	 Daniel Stenberg
					Daniel Stenberg