Fixes metrics also with regular request timeouts. (#1550)

Author: AlliBalliBaba

context.go

@@ -152,9 +152,9 @@ func (fc *frankenPHPContext) reject(statusCode int, message string) {
 	if rw != nil {
 		rw.WriteHeader(statusCode)
 		_, _ = rw.Write([]byte(message))
-		
+
 		if f, ok := rw.(http.Flusher); ok {
-    		f.Flush()
+			f.Flush()
 		}
 	}
 

threadregular.go

@@ -118,6 +118,7 @@ func handleRequestWithRegularPHPThreads(fc *frankenPHPContext) {
 			// the request has triggered scaling, continue to wait for a thread
 		case <-timeoutChan(maxWaitTime):
 			// the request has timed out stalling
+			metrics.DequeuedRequest()
 			fc.reject(504, "Gateway Timeout")
 			return
 		}