@@ -547,6 +547,9 @@ $listen_string

     LimitRequestFieldSize $f_header_size

     RequestHeader set X-Forwarded-Proto "https"

+    # Avoid races (at the cost of performance) to re-use a pooled connection

+    # where the connection is closed (bug 1807518).

+    SetEnv proxy-initial-not-pooled

     <Location />

         ProxyPass http://$b_host:$b_port/ retry=0 nocanon

         ProxyPassReverse http://$b_host:$b_port/