There has been a request to implement a rate-limiting feature in

ReviewBoard's authentication form by tracking the number of failed login

attempts per IP/username in the cache, along with the last login time,

and prevent further logins until some amount of time has passed.

This has been tested manually by attempting to log into reviewboard with

an existing username but incorrect password until the maximum number of

attempts has been reached. In addition, the number of login attempts and

time left before rate limit is over was also tracked during this process

using print statements in djblet's ratelimit.py file (more specifically,

the dictionary returned from the get_usage_count() method in ratelimit.py).