Changes with nginx 1.21.2 31 Aug 2021

*) Change: now nginx rejects HTTP/1.0 requests with the
"Transfer-Encoding" header line.

*) Change: export ciphers are no longer supported.

*) Feature: OpenSSL 3.0 compatibility.

*) Feature: the "Auth-SSL-Protocol" and "Auth-SSL-Cipher" header lines
are now passed to the mail proxy authentication server.
Thanks to Rob Mueller.

*) Feature: request body filters API now permits buffering of the data
being processed.

*) Bugfix: backend SSL connections in the stream module might hang after
an SSL handshake.

*) Bugfix: the security level, which is available in OpenSSL 1.1.0 or
newer, did not affect loading of the server certificates when set
with "@SECLEVEL=N" in the "ssl_ciphers" directive.

*) Bugfix: SSL connections with gRPC backends might hang if select,
poll, or /dev/poll methods were used.

*) Bugfix: when using HTTP/2 client request body was always written to
disk if the "Content-Length" header line was not present in the
request.


--
Maxim Dounin
http://nginx.org/
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