add vendoring with go dep

vendor/github.com/influxdata/influxdb/influxql/monitor.go

@@ -0,0 +1,23 @@
+package influxql
+
+import "time"
+
+// PointLimitMonitor is a query monitor that exits when the number of points
+// emitted exceeds a threshold.
+func PointLimitMonitor(itrs Iterators, interval time.Duration, limit int) QueryMonitorFunc {
+	return func(closing <-chan struct{}) error {
+		ticker := time.NewTicker(interval)
+		defer ticker.Stop()
+		for {
+			select {
+			case <-ticker.C:
+				stats := itrs.Stats()
+				if stats.PointN >= limit {
+					return ErrMaxSelectPointsLimitExceeded(stats.PointN, limit)
+				}
+			case <-closing:
+				return nil
+			}
+		}
+	}
+}