Module sandboxing system

Sandboxing makes module scripts run inside an isolated lua environments,
making more easier and secure to script

Move and rework TextMessage using the new sandbox system

modules/game_textmessage/protocol.lua

@@ -0,0 +1,60 @@
+function getMessageTypes(version)
+  if version >= 960 then
+    perror("TODO: message types for 9.6")
+    return {}
+  elseif version >= 861 then
+    return {
+      [13] = 'ConsoleOrange',
+      [14] = 'ConsoleOrange',
+      [15] = 'Warning',
+      [16] = 'EventAdvance',
+      [17] = 'EventDefault',
+      [18] = 'StatusDefault',
+      [19] = 'Info',
+      [20] = 'StatusSmall',
+      [21] = 'ConsoleBlue',
+      [22] = 'ConsoleRed'
+    }
+  elseif version >= 854 then
+    return {
+      [18] = 'ConsoleRed',
+      [19] = 'ConsoleOrange',
+      [20] = 'ConsoleOrange',
+      [21] = 'Warning',
+      [22] = 'EventAdvance',
+      [23] = 'EventDefault',
+      [24] = 'StatusDefault',
+      [25] = 'Info',
+      [26] = 'StatusSmall',
+      [27] = 'ConsoleBlue'
+    }
+  else
+    return {
+      [18] = 'Warning',
+      [19] = 'EventAdvance',
+      [20] = 'EventDefault',
+      [21] = 'StatusDefault',
+      [22] = 'Info',
+      [23] = 'StatusSmall',
+      [24] = 'ConsoleBlue',
+      [25] = 'ConsoleRed',
+      [26] = 'ConsoleOrange',
+      [27] = 'ConsoleOrange',
+    }
+   end
+end
+
+function parseTextMessage(msg)
+  local msgtype = msg:getU8()
+  local text = msg:getString()
+  msgtype = getMessageTypes(g_game.getProtocolVersion())[msgtype]
+  signalcall(g_game.onTextMessage, msgtype, text)
+end
+
+function registerProtocol()
+  ProtocolGame.registerOpcode(GameServerOpcodes.GameServerTextMessage, parseTextMessage)
+end
+
+function unregisterProtocol()
+  ProtocolGame.unregisterOpcode(GameServerOpcodes.GameServerTextMessage)
+end