BREAK task_description [signalmask|C|D|E|F]

* BREAK sets some signals at a given task
* task_description can be one of:
  - task/process name (case dependent !)
  - task/process adress
  - CLI-process number (one from 1 to 20)
  - zero (0) for this task
  It will be checked if the node-type field contains TASK or PROCESS
* signalmask is a longword; all bits, which should be signalled,
  must be 1 . Alternatively you can specify c,d,e or f to set
  the according signal to CTRL-C,-D,-E or -F. (CTRL-C is bit 12)
* BREAK without signalmask (and c,d,e,f) given sets all signals the
  task is waiting for.

eg.     break RexxMaster    {and it will be gone...}
        break Exchange c    {Exchange will get itself off too}

eg. If 2 ZShells are running. The one with the CLI-number 1 (get that
    out with prompt %n) lists a very large directory. You can break
    that by using the other ZShell typing:
        break 1 c
    Thats the same like you pressed CTRL-C on the ZShell number 1.