middleware: Update references in comments to why Hijacker is needed

common/middleware/errorhandler.go

@@ -83,7 +83,7 @@ func (i *errorInterceptor) Write(data []byte) (int, error) {
 }
 
 // errorInterceptor also implements net.Hijacker, to let the downstream Handler
-// hijack the connection. This is needed by the app-mapper's proxy.
+// hijack the connection. This is needed, for example, for working with websockets.
 func (i *errorInterceptor) Hijack() (net.Conn, *bufio.ReadWriter, error) {
 	hj, ok := i.originalWriter.(http.Hijacker)
 	if !ok {

common/middleware/logging.go

@@ -45,7 +45,7 @@ var LogFailed = Log{
 // want to report on success, i.e. http.StatusOK.
 //
 // interceptor also implements net.Hijacker, to let the downstream Handler
-// hijack the connection. This is needed by the app-mapper's proxy.
+// hijack the connection. This is needed, for example, for working with websockets.
 type interceptor struct {
 	http.ResponseWriter
 	statusCode int