Updated: nghttp2, libnghttp2{_14, -devel}, {python{37, 38}, mingw64-{x86_64, i686}}-nghttp2 1.46

[Cygwin nghttp2 Maintainer <Brian.Inglis@SystematicSW.ab.ca>]

The following packages have been upgraded in the Cygwin distribution:

* nghttp2			1.46
* libnghttp2_14			1.46
* libnghttp2-devel		1.46
* python37-nghttp2		1.46
* python38-nghttp2		1.46
* mingw64-x86_64-nghttp2	1.46
* mingw64-i686-nghttp2		1.46

HTTP/2 and its header compression algorithm HPACK implementation.
The framing layer of HTTP/2 is implemented as a reusable library.
Also included are an HTTP/2 client, server, proxy, load test and
benchmarking tool, and Python modules.

For more information see the project home page:

	https://nghttp2.org/

or the repo README:

	https://github.com/nghttp2/nghttp2#readme

Please see below or read /usr/share/doc/nghttp2/ChangeLog after
installation for complete details of changes:

	https://nghttp2.org/blog/


Nghttp2 v1.46.0	Oct 19th, 2021 7:07 pm

Features

* HTTP/3 feature is now available with BoringSSL.
* Compile with BoringSSL for non-http3 build
* Guard msghdr_get_local_addr with ENABLE_HTTP3 macro (GH-1620)

Nghttpx

* SCT data is now available with BoringSSL.
* New QUIC and HTTP/3 related options were added:
  --frontend-quic-initial-rtt, --quic-server-id, and --rlimit-memlock.
* --frontend-quic-connection-id-encryption-key has been removed, and the
* new option --frontend-quic-secret-file added to specify initial keying
  materials to generate QUIC secrets and keys for connection ID and
  tokens. Also supports rotation of keying materials.
* HTTP/3 ALPN h3-29 is now supported.
* --worker-process-grace-shutdown-period option sets maximum period for
  worker to terminate gracefully.
* --max-worker-processes option was added to limit worker processes.
* Reduce dgram size if sendmsg fails with EINVAL or EMSGSIZE
* Fix wrong SSL_CTX object usage
* Respect !tls-no-postpone-early-data with boringssl
* Send session ticket after handshake with boringssl
* Unload BPF program after setting up all QUIC listeners
* Unload BPF objects on reload to avoid running out of memlock
* Allocate server id in Connection ID (see --quic-server-id option)

Build

* Workaround broken version check in AX_PYTHON_DEVEL macro.
* Add missing cmake files to EXTRA_DIST.
* Remove check for UDP_SEGMENT (GH-1619)
* Fix issue that libev cannot be found with autotools under mac osx
* Fix compile error with libressl
* Always include optional files in EXTRA_DIST