docs: def cli(conf):
      """ OpenVPN client_disconnect method
      """
      config = init_config(conf)
      nas_id = config.get('DEFAULT', 'nas_id')
      secret = config.get('DEFAULT', 'radius_secret')
      nas_addr = config.get('DEFAULT', 'nas_addr')
      radius_addr = config.get('DEFAULT', 'radius_addr')
      radius_acct_port = config.getint('DEFAULT', 'radius_acct_port')
      radius_timeout = config.getint('DEFAULT', 'radius_timeout')
      status_dbfile = config.get('DEFAULT', 'statusdb')
  
      username = os.environ.get('username')
      userip = os.environ.get('ifconfig_pool_remote_ip')
      realip = os.environ.get('trusted_ip')
      realport = os.environ.get('trusted_port')
      session_id = md5(nas_addr + realip + realport).hexdigest()
  
      req = {'User-Name':username}
      req['Acct-Status-Type'] = ACCT_STOP
      req['Acct-Session-Id'] = session_id
      req["Acct-Output-Octets"]  =  0
      req["Acct-Input-Octets"]  =  0 
      req['Acct-Session-Time'] = 0
      req["NAS-IP-Address"]     = nas_addr
      req["NAS-Port-Id"]     = '0/0/0:0.0'
      req["NAS-Port"]           = 0
      req["Service-Type"]       = "Login-User"
      req["NAS-Identifier"]     = nas_id
      req["Called-Station-Id"]  = '00:00:00:00:00:00'
      req["Calling-Station-Id"] = '00:00:00:00:00:00'
      req["Framed-IP-Address"]  = userip
   
      def shutdown(exitcode=0):
          reactor.addSystemEventTrigger('after', 'shutdown', os._exit,exitcode)
          reactor.stop()
  
      def onresp(r):
          try:
              statusdb.del_client(status_dbfile,session_id)
              log.msg('delete online<%s> client from db'%session_id)
          except Exception as e:
              log.err('del client online error')
              log.err(e)        
          shutdown(0)
  
      def onerr(e):
          log.err(e)
          shutdown(1)
  
      d = client.send_acct(str(secret), get_dictionary(), radius_addr, 
          acctport=radius_acct_port, debug=True,**req)
      d.addCallbacks(onresp,onerr)
      reactor.callLater(radius_timeout,shutdown,1)
      reactor.run()