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curl/docs/cmdline-opts/http2.md
Daniel Stenberg e7219c2bdc
cmdline-opts: language cleanups 
Use imperative mood consistently for the first sentence describing an
option.

"Set this" instead "tell curl to set" or "this sets..."

Plus some extra cleanups and rephrasing.

Closes #13106
2024-03-12 15:42:33 +01:00

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c SPDX-License-Identifier Long Tags Protocols Added Mutexed Requires Help Category Multi See-also Example
Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al. curl http2 Versions HTTP 7.33.0 http1.1 http1.0 http2-prior-knowledge http3 HTTP/2 Use HTTP/2 http mutex
http1.1
http3
no-alpn
--http2 $URL

--http2

Use HTTP/2.

For HTTPS, this means curl negotiates HTTP/2 in the TLS handshake. curl does this by default.

For HTTP, this means curl attempts to upgrade the request to HTTP/2 using the Upgrade: request header.

When curl uses HTTP/2 over HTTPS, it does not itself insist on TLS 1.2 or higher even though that is required by the specification. A user can add this version requirement with --tlsv1.2.