Default to 2 second timeout for http servers

Default to 2 second timeout for http servers

Taking a performance hit on 'hello world' benchmark by enabling this by
default, but I think it's worth it. Hopefully we can improve performance by
resetting the timeout less often - ideally a 'hello world' benchmark would
only touch the one timer once - if it runs in less than 2 seconds. The rest
should be just link list manipulations.