Need reviewer for 6907760: (file) OVERFLOW event should cause pending events to be purged

[Alan Bateman]

This is a follow-up to the discussion on the handling of WatchService 
overflow events that John Hendrikx brought up on this mailing list in 
December. A suggestion to come from that discussion is that the 
implementation can drop pending events when queuing an overflow event. 
That will save the application from needlessly processing these events. 
Similarly, there isn't any point queuing events while there is an 
overflow event pending.  The webrev with the proposed changes is here:
  http://cr.openjdk.java.net/~alanb/6907760/webrev.00/

Thanks,
Alan.