docs: def disable():
      '''
      Disable the Packet Filter.
  
      CLI example:
  
      .. code-block:: bash
  
          salt '*' pf.disable
      '''
      ret = {}
      result = __salt__['cmd.run_all']('pfctl -d',
                                       output_loglevel='trace',
                                       python_shell=False)
  
      if result['retcode'] == 0:
          ret = {'comment': 'pf disabled', 'changes': True}
      else:
          # If pf was already disabled the return code is also non-zero.
          # Don't raise an exception in that case.
          if result['stderr'] == 'pfctl: pf not enabled':
              ret = {'comment': 'pf already disabled', 'changes': False}
          else:
              raise CommandExecutionError(
                  'Could not disable pf',
                  info={'errors': [result['stderr']], 'changes': False}
              )
  
      return ret