Updated: nghttp2, libnghttp2-devel/_14, mingw64-x86_64-nghttp2 1.68 - HTTP/2 and HPACK header compression implementation

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.

For more information see the project home page:

	https://nghttp2.org/

or the repo README:

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

NOTES:

Support for previously deprecated Python bindings, modules, and
documentation was dropped some releases ago.

The following packages have been upgraded in the Cygwin distribution:

- nghttp2			1.68
- libnghttp2-devel		1.68
- libnghttp2_14			1.68
- mingw64-x86_64-nghttp2	1.68

For changes since the previous Cygwin release, see below or
https://nghttp2.org/blog/; for complete details of changes see
/usr/share/doc/nghttp2/ChangeLog after installation.


2025-10-25	1.68

   Do not download the archive files generated by GitHub.
   They do not work.
   Please download the signed and versioned tar balls,
   such as nghttp2-1.68.0.tar.gz.

lib

   This release adds more glitch counters for the unexpected builtin
   extension frames.

h2load

   This release changes the default QUIC window-bits to 24 to reduce the
   fragmentation on huge packet losses.

nghttpd

   This release makes the supported groups configurable with --groups
   option.

nghttpx

   TLSv1.0 and TLSv1.1 support has been dropped.

   ML-DSA certificates are now selected over ECDSA and RSA.
   ML-DSA certificates are supported by OpenSSL and wolfSSL TLS backends.

   Certificate selection based on client capability is extended to
   wolfSSL and BoringSSL.

   --group option has been added.
   --ecdh-curves option has been deprecated, and if it is used,
   it is treated as if --group option is used.

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