When multiple requests are processed by rate limiter plug at the same
time and the bucket is not yet initialized, both would try to initialize
the bucket resulting in an internal server error.
It was used to check that authenticated and unauthenticated users have
different limits. Instead of sleeping a super low limit for
unauthenticated users was set, preventing them from doing 5 requests in
the first place.
rinpatch
Ivan Tashkinov
Maxim Filippov
Egor Kislitsyn
Steven Fuchs
Ivan Tashkinov
feld