Initialize nginx process error channel #4476
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goroutines that write to ngxErrCh remain asleep forever without that necessary initialization.
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What this PR does / why we need it:
The goroutine created by
(*NGINXController) start()remains asleep forever without that necessary initialization. As a result, the<-n.ngxErrChselect case is never visited, and the mainnginxprocess isn't respawned after it returns.Leftover from #2164
/kind bug