Log Message:
nginx-devel: updated to 1.21.1

Changes with nginx 1.21.1

*) Change: now nginx always returns an error for the CONNECT method.

*) Change: now nginx always returns an error if both "Content-Length"
   and "Transfer-Encoding" header lines are present in the request.

*) Change: now nginx always returns an error if spaces or control
   characters are used in the request line.

*) Change: now nginx always returns an error if spaces or control
   characters are used in a header name.

*) Change: now nginx always returns an error if spaces or control
   characters are used in the "Host" request header line.

*) Change: optimization of configuration testing when using many
   listening sockets.

*) Bugfix: nginx did not escape """, "<", \ 
">", "\", "^", "`", "{", \ 
"|",
   and "}" characters when proxying with changed URI.

*) Bugfix: SSL variables might be empty when used in logs; the bug had
   appeared in 1.19.5.

*) Bugfix: keepalive connections with gRPC backends might not be closed
   after receiving a GOAWAY frame.

*) Bugfix: reduced memory consumption for long-lived requests when
   proxying with more than 64 buffers.