Log Message:
nginx-devel: updated to 1.13.9

nginx 1.13.9:

*) Feature: HTTP/2 server push support; the "http2_push" and
   "http2_push_preload" directives.

*) Bugfix: "header already sent" alerts might appear in logs when using
   cache; the bug had appeared in 1.9.13.

*) Bugfix: a segmentation fault might occur in a worker process if the
   "ssl_verify_client" directive was used and no SSL certificate was
   specified in a virtual server.

*) Bugfix: in the ngx_http_v2_module.

*) Bugfix: in the ngx_http_dav_module.