[Info-vax] hung program location

[Bob Koehler]

> 
> There are no direct $hiber or $wait calls, but I use lib$wait to cause
> brief pauses.

   LIB$WAIT is a cover for $WAIT, so check the times that are passed
   and the passing mechanism.  An address could look like a large
   time.

> Can't think of where other hidden $hiber's could be, unless they
> happen in QIO calls.

   $QIO does not use HIB.