Show disconnect reason from server by default

I was missing it for a 'Wrong password' error
but it is also nice in the non error case
or all other disconnects triggered by the server
like kick etc

lib/game_client.rb

@@ -144,8 +144,11 @@ class GameClient
     @client.send_msg_start_info
   end
 
-  def on_disconnect
-    call_hook(:disconnect, Context.new(nil))
+  def on_disconnect(data)
+    context = Context.new(nil, reason: data)
+    return if call_hook(:disconnect, context).nil?
+
+    puts "got disconnect. reason='#{context.data[:reason]}'"
   end
 
   def on_rcon_line(chunk)

lib/teeworlds_client.rb

@@ -354,8 +354,8 @@ class TeeworldsClient
     send_info
   end
 
-  def on_msg_close
-    @game_client.on_disconnect
+  def on_msg_close(data)
+    @game_client.on_disconnect(data)
   end
 
   private
@@ -365,7 +365,7 @@ class TeeworldsClient
     case msg
     when NET_CTRLMSG_TOKEN then on_msg_token(data)
     when NET_CTRLMSG_ACCEPT then on_msg_accept
-    when NET_CTRLMSG_CLOSE then on_msg_close
+    when NET_CTRLMSG_CLOSE then on_msg_close(data)
     when NET_CTRLMSG_KEEPALIVE # silently ignore keepalive
     else
       puts "Uknown control message #{msg}"