Fixed machine stiff if connection left idle too long.
Stewart Brodie authored
Detail:
  SVC stack overflow occurred due to the recursive method used to
    discard the idle-out prevention responses.  This no longer
    happens.
  Fixed a bit of debugging which caused data aborts!
  Optimised a select() call to pass s + 1 as the first parameter to
    save Internet time in processing the fd_set.
Admin:
  Tested on desktop build, with the idle timers set to send idle outs
    every second (so we don't have to wait 100 hours for the problem
    to occur).  No longer get problems with the machine stiffing.


Version 2.12. Tagged as 'LanManFS-2_12'
4fc58c21