The login limiter counted failures per (address, username) only after
the check finished, so attempts sent together all passed before the
first failure was recorded, and one address could own every record of
the bounded table and push out the one holding its own failures.
An admitted attempt now holds a slot until it reports back, and an
address is blocked as a whole after five times the per-username limit
spread over any names, which also caps the records one peer can own.
MHSanaei
8e8541a5d8