Log Message:
nginx-devel: updated to 1.21.3

Changes with nginx 1.21.3                                        07 Sep 2021

    *) Change: optimization of client request body reading when using
       HTTP/2.

    *) Bugfix: in request body filters internal API when using HTTP/2 and
       buffering of the data being processed.

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.