vendor dependencies with dep

vendor/github.com/go-chi/chi/middleware/closenotify18.go

@@ -0,0 +1,17 @@
+// +build go1.8
+
+package middleware
+
+import (
+	"net/http"
+)
+
+// CloseNotify is a middleware that cancels ctx when the underlying
+// connection has gone away. It can be used to cancel long operations
+// on the server when the client disconnects before the response is ready.
+//
+// Note: this behaviour is standard in Go 1.8+, so the middleware does nothing
+// on 1.8+ and exists just for backwards compatibility.
+func CloseNotify(next http.Handler) http.Handler {
+	return next
+}