diff1294:61e9f23a566d Tue Nov 26 14:14:00 UTC 2019 Max Romanov <max.romanov@nginx.com> Refactoring reference counting of req_app_link.
The reason for the change is that the req_app_link reference count was incorrect if the application crashed at start; in this case, the nxt_request_app_link_update_peer() function was never called.