Rinda::RingServer#shutdown

# File tmp/rubies/ruby-3.1.3/lib/rinda/ring.rb, line 227
def shutdown
  @renewer.renew = false

  @w_services.each do |thread|
    thread.kill
    thread.join
  end

  @sockets.each do |socket|
    socket.close
  end

  @r_service.kill
  @r_service.join
end