CI is sometimes slow, so 100ms was not enough time for all events
to be sent and processed in `http/events_test.go`.
We bumped that timeout to a full 1 second, but also added a trick at
the end to shorten the timeout once the expected number of events
have been receieved. This way, once the test has passed, we only
wait 100ms for any "extra" events to make the test fail, instead
of waiting for the full 1 second before we let the test pass. This
should keep the test relatively fast, while still allowing for it to
be slow sometimes.
917a5863fe