Philip Withnall authored Aug 08, 2014 and Olivier Crête committed Aug 21, 2014

The TIME-WAIT timeout is typically 2×MSL (on the order of 60 seconds),
which is needed to be able to reject delayed segments from closed
conversations. However, the underlying socket layer for pseudo-TCP takes
care of channel numbering so that segments don’t end up being sent to
closed conversations. Therefore, the TIME-WAIT state can be eliminated
(by shortening the timeout). The code for the state is kept around so
that the pseudo-TCP implementation matches the TCP specification
correctly, which will simplify maintenance.