potential fix for switch disconnect during send
actually place exception-throwing line inside try
merge fix
temporarily comment out since try_lwt does not catch this
add debugging info
regenerate oasis files w debugging info
first cut at supporting nwaddr w mask
whoops, should use mask instead of value here
more comments
clarify comments
quicktest support for masked IP addrs

one subtlety is that m_mask = None is equivalent to m_mask = Some 0
so change how Match.marshal works to make quicktest happy about this