Log Message:
nginx-devel: updated to 1.17.9

Changes with nginx 1.17.9

*) Change: now nginx does not allow several "Host" request header lines.
*) Bugfix: nginx ignored additional "Transfer-Encoding" request header
   lines.
*) Bugfix: socket leak when using HTTP/2.
*) Bugfix: a segmentation fault might occur in a worker process if OCSP
   stapling was used.
*) Bugfix: in the ngx_http_mp4_module.
*) Bugfix: nginx used status code 494 instead of 400 if errors with code
   494 were redirected with the "error_page" directive.
*) Bugfix: socket leak when using subrequests in the njs module and the
   "aio" directive.

Changes with nginx 1.17.8

*) Feature: variables support in the "grpc_pass" directive.
*) Bugfix: a timeout might occur while handling pipelined requests in an
   SSL connection; the bug had appeared in 1.17.5.
*) Bugfix: in the "debug_points" directive when using HTTP/2.