master branch release , within which the development of new features continues (in a parallel supported stable only changes related to the elimination of serious errors and vulnerabilities are made).
In the new version new directive "", which allows you to add a delay for unauthorized requests with a 401 response code to reduce the intensity of password guessing and protection against , manipulating the measurement of the execution time of operations (timing attack) when accessing systems with limited access , or (JSON Web Token).
Source: opennet.ru