commit d5da8fa776ff62ea3ccb81f8438a4bfe340d364b
author Maxim Dounin <mdounin@mdounin.ru> Tue Feb 18 17:30:40 2014 +0400
committer Maxim Dounin <mdounin@mdounin.ru> Tue Feb 18 17:30:40 2014 +0400
tree 6e45c4be8fda689d6f1f6876ee7496ce96dc9c24
parent d08e51c2da86e93a2b375078677b9c430b723019

Upstream: ngx_post_event() instead of upgraded call (ticket #503).

If a request is finalized in the first call to the
ngx_http_upstream_process_upgraded() function, e.g., because upstream
server closed the connection for some reason, in the second call
the u->peer.connection pointer will be null, resulting in segmentation
fault.

Fix is to avoid second direct call, and post event instead.  This ensures
that ngx_http_upstream_process_upgraded() won't be called again if
a request is finalized.