* sync: merge with upstream tag/go-1.21rc3 (#11)

* fix: all tests pass

* impl: UQUIC Transport

* deps: bump up min Go version

* new: uquic

* fix: add QUICTransportParameter

---------

Co-authored-by: Russ Cox <rsc@golang.org>
Co-authored-by: Filippo Valsorda <filippo@golang.org>
Co-authored-by: Filippo Valsorda <hi@filippo.io>
Co-authored-by: Katie Hockman <katie@golang.org>
Co-authored-by: Ainar Garipov <gugl.zadolbal@gmail.com>
Co-authored-by: Brad Fitzpatrick <bradfitz@golang.org>
Co-authored-by: fenos <fabri.feno@gmail.com>
Co-authored-by: Bryan C. Mills <bcmills@google.com>
Co-authored-by: Josh Bleecher Snyder <josharian@gmail.com>
Co-authored-by: Olivier Poitrey <rs@netflix.com>
Co-authored-by: Ville Skyttä <ville.skytta@iki.fi>
Co-authored-by: Alex Harford <alex.harford@saucelabs.com>
Co-authored-by: Johan Jansson <johan.jansson@iki.fi>
Co-authored-by: Ziheng Liu <lzhfromustc@gmail.com>
Co-authored-by: Chris Le Roy <brompwnie@users.noreply.github.com>
Co-authored-by: Brad Fitzpatrick <brad@danga.com>
Co-authored-by: Dmitri Shuralyov <dmitshur@golang.org>
Co-authored-by: Roland Shoemaker <rolandshoemaker@gmail.com>
Co-authored-by: Daniel <cpu@letsencrypt.org>
Co-authored-by: Chen.Zhidong <njutczd@gmail.com>
Co-authored-by: Cherry Zhang <cherryyz@google.com>
Co-authored-by: Luca Spiller <luca@stackednotion.com>
Co-authored-by: Thom Wiggers <thom@thomwiggers.nl>
Co-authored-by: cch123 <buaa.cch@gmail.com>
Co-authored-by: Johan Brandhorst <johan.brandhorst@gmail.com>
Co-authored-by: Roland Shoemaker <roland@golang.org>
Co-authored-by: John Bampton <jbampton@gmail.com>
Co-authored-by: Matt T. Proud <matt.proud@gmail.com>
Co-authored-by: Naman Gera <namangera15@gmail.com>
Co-authored-by: vinckr <vincent@ory.sh>
Co-authored-by: Sofía Celi <cherenkovd69@gmail.com>
Co-authored-by: Watson Ladd <watson@cloudflare.com>
Co-authored-by: Agniva De Sarker <agnivade@yahoo.co.in>
Co-authored-by: Heschi Kreinick <heschi@google.com>
Co-authored-by: Chressie Himpel <chressie@google.com>
Co-authored-by: Dan Kortschak <dan@kortschak.io>
Co-authored-by: Nicolas Hillegeer <aktau@google.com>
Co-authored-by: Ian Lance Taylor <iant@golang.org>
Co-authored-by: Lasse Folger <lassefolger@google.com>
Co-authored-by: Daniel Martí <mvdan@mvdan.cc>
Co-authored-by: David Taylor <tinystatemachine@gmail.com>
Co-authored-by: Tatiana Bradley <tatiana@golang.org>
Co-authored-by: cuiweixie <cuiweixie@gmail.com>
Co-authored-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Co-authored-by: Ludi Rehak <ludi317@gmail.com>
Co-authored-by: Mike Faraponov <mikefaraponov@gmail.com>
Co-authored-by: Abirdcfly <fp544037857@gmail.com>
Co-authored-by: cui fliter <imcusg@gmail.com>
Co-authored-by: Gabor Tanz <gabor.tanz@swisscom.com>
Co-authored-by: Tobias Klauser <tklauser@distanz.ch>
Co-authored-by: Anit Gandhi <agandhi@digitalocean.com>
Co-authored-by: Tero Saarni <tero.saarni@gmail.com>
Co-authored-by: Sebastiaan van Stijn <github@gone.nl>
Co-authored-by: Damien Neil <dneil@google.com>
Co-authored-by: Monis Khan <i@monis.app>
Co-authored-by: Marten Seemann <martenseemann@gmail.com>

Go 1.19 will fail to build or pass the test once we bump up to the new version.

…209)

* [release-branch.go1.21] crypto/tls: restrict RSA keys in certificates to <= 8192 bits

Extremely large RSA keys in certificate chains can cause a client/server
to expend significant CPU time verifying signatures. Limit this by
restricting the size of RSA keys transmitted during handshakes to <=
8192 bits.

Based on a survey of publicly trusted RSA keys, there are currently only
three certificates in circulation with keys larger than this, and all
three appear to be test certificates that are not actively deployed. It
is possible there are larger keys in use in private PKIs, but we target
the web PKI, so causing breakage here in the interests of increasing the
default safety of users of crypto/tls seems reasonable.

Thanks to Mateusz Poliwczak for reporting this issue.

Fixes CVE-2023-29409

Change-Id: Ie35038515a649199a36a12fc2c5df3af855dca6c
Reviewed-on: https://team-review.git.corp.google.com/c/golang/go-private/+/1912161
Reviewed-by: Damien Neil <dneil@google.com>
Reviewed-by: Tatiana Bradley <tatianabradley@google.com>
Run-TryBot: Roland Shoemaker <bracewell@google.com>
(cherry picked from commit d865c715d92887361e4bd5596e19e513f27781b7)
Reviewed-on: https://go-review.googlesource.com/c/go/+/515056
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>

replace old build status badge with new ones, bump up required version noted in docs, update developer contact to reflect current status.