- Make the time given for requests to complete gracefully configurable.
- Complete all async reads so calling code can re-check whether to stop
request processing and exit if in between requests.
- Don't wait for a FIN from the client since some browsers (e.g. IE & Chrome)
will take a long time to send one.
- Ensure all ConnectionFilters complete before the memory pool is disposed.
- Ensure blocks get returned even when a ConnectionFilter produces a failed read