tcp connections hanging

[M. Warner Losh]

OK.  I'm getting very frustrated with my TCP connections hanging.  It
happens when I log into remote sites, when I try to encode dvds, etc.
It is driving me nuts.  This is with current from today.  Current from
5 or 6 weeks ago doesn't seem to be bothered by this issue.

Has anybody else seen it?  Is there a fix being tested?  I can trigger
it trivially here...

Warner