/[NO]PSIMUL_INPUT

   This qualifier is for use with the PERMIT_INPUT and REQUEST_INPUT
   hot-keys which temporarily grant keyboard control to a watcher who
   would not otherwise have it. (See the PEEK Watching Subtopics:
   /PERMIT_INPUT and /REQUEST_INPUT.)

   When a watcher has been permitted temporary keyboard control,
   the /PSIMUL_INPUT qualifier specifies whether or not both the
   watcher and watchee will be able to enter keyboard input to the
   user's process simultaneously, without having to use the
   TOGGLE_INPUT hot-key.

   The logical WATCHER$PSIMUL_INPUT specifies the default value.

   When simultaneous input is allowed, the TOGGLE_INPUT hot-key will
   have no effect on the user being watched. TOGGLE_INPUT's by the
   watcher will just enable/disable his own keyboard input.

   The watcher starts with keyboard input enabled when simultaneous
   input is in effect.

   The logical WATCHER$PSIMUL specifies the default value for this
   qualifier.

   For examples see /SIMULTANEOUS_INPUT.

   /PSIMUL_INPUT is provided in addition to /SIMULTANEOUS_INPUT to make
   it possible to have a different simultaneous value which applies only
   when one is a permitted-input watcher.