Log Message:
nginx-devel: updated to 1.13.7

Changes with nginx 1.13.7:
*) Bugfix: in the $upstream_status variable.
*) Bugfix: a segmentation fault might occur in a worker process if a
   backend returned a "101 Switching Protocols" response to a
   subrequest.
*) Bugfix: a segmentation fault occurred in a master process if a shared
   memory zone size was changed during a reconfiguration and the
   reconfiguration failed.
*) Bugfix: in the ngx_http_fastcgi_module.
*) Bugfix: nginx returned the 500 error if parameters without variables
   were specified in the "xslt_stylesheet" directive.
*) Workaround: "gzip filter failed to use preallocated memory" alerts
   appeared in logs when using a zlib library variant from Intel.
*) Bugfix: the "worker_shutdown_timeout" directive did not work when
   using mail proxy and when proxying WebSocket connections.