Correct a comment.
Debugging test_fork_and_schedule_refresh.
Update FAQ for new max_pool_size. PYTHON-436
Fix Pool's logic when request sockets are broken. PYTHON-537
Pool code clarification. PYTHON-537
More Pool code clarification. PYTHON-537
Work around Python issue 18418 in RS client.
Rename Monitor.event -> timer

Too many events on the Monitor now, needs a distinct name.
Note that RS clients are invalid after a fork.