Replace $riosrv by $wsys.
-- 
/sys/man/4/rio
rio.orig:379,385 - /n/sources/patch/applied/rio-man-4/rio:379,385
  to be printed there.
  .IP
  .EX
- mount $riosrv /tmp 'new -r 0 0 128 64 -pid '$pid
+ mount $wsys /tmp 'new -r 0 0 128 64 -pid '$pid
  echo hi > /tmp/cons
  .EE
  .PP