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Add an UnencryptedHTTP2 protocol value. Both Server and Transport implement "HTTP/2 with prior knowledge" as described in RFC 9113, section 3.3. Neither supports the deprecated HTTP/2 upgrade mechanism (RFC 7540, section 3.2 "h2c"). For Server, UnencryptedHTTP2 controls whether the server will accept HTTP/2 connections on unencrypted ports. When enabled, the server checks new connections for the HTTP/2 preface and routes them appropriately. For Transport, enabling UnencryptedHTTP2 and disabling HTTP1 causes http:// requests to be made over unencrypted HTTP/2 connections. For #67816 Change-Id: I2763c4cdec1c2bc6bb8157edb93b94377de8a59b Reviewed-on: https://go-review.googlesource.com/c/go/+/622976 LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Keith Randall <khr@google.com> Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Files in this directory are data for Go's API checker ("go tool api", in src/cmd/api).
Each file is a list of API features, one per line.
go1.txt (and similarly named files) are frozen once a version has been
shipped. Each file adds new lines but does not remove any.
except.txt lists features that may disappear without breaking true
compatibility.
Starting with go1.19.txt, each API feature line must end in "#nnnnn"
giving the GitHub issue number of the proposal issue that accepted
the new API. This helps with our end-of-cycle audit of new APIs.
The same requirement applies to next/* (described below), which will
become a go1.XX.txt for XX >= 19.
The next/ directory contains the only files intended to be mutated.
Each file in that directory contains a list of features that may be added
to the next release of Go. The files in this directory only affect the
warning output from the go api tool. Each file should be named
nnnnn.txt, after the issue number for the accepted proposal.
(The #nnnnn suffix must also appear at the end of each line in the file;
that will be preserved when next/*.txt is concatenated into go1.XX.txt.)
When you add a file to the api/next directory, you must add at least one file
under doc/next. See doc/README.md for details.