Make load() only usable in debug mode

docs/wip-plugins.md

@@ -145,6 +145,7 @@ end
 
 #### `load(chunk [, chunkname [, mode [, env]]])`
 
+This function is only available if Chatterino is compiled in debug mode. It is meant for debugging with little exception.
 This function behaves really similarity to Lua's `load`, however it does not allow for bytecode to be executed.
 It achieves this by forcing all inputs to be encoded with `UTF-8`.
 

src/controllers/plugins/LuaApi.cpp

@@ -162,6 +162,10 @@ int c2_log(lua_State *L)
 
 int g_load(lua_State *L)
 {
+#ifdef NDEBUG
+    luaL_error(L, "load() is only usable in debug mode");
+    return 0;
+#else
     auto countArgs = lua_gettop(L);
     QByteArray data;
     if (lua::peek(L, &data, 1))
@@ -199,6 +203,7 @@ int g_load(lua_State *L)
     lua_call(L, countArgs, LUA_MULTRET);
 
     return lua_gettop(L);
+#endif
 }
 
 int g_dofile(lua_State *L)

src/controllers/plugins/PluginController.cpp

@@ -168,10 +168,13 @@ void PluginController::openLibrariesFor(lua_State *L,
 
     lua_pushglobaltable(L);
     auto gtable = lua_gettop(L);
-    lua_getfield(L, gtable, "load");
 
     // possibly randomize this name at runtime to prevent some attacks?
+
+#ifndef NDEBUG
+    lua_getfield(L, gtable, "load");
     lua_setfield(L, LUA_REGISTRYINDEX, "real_load");
+#endif
 
     lua_getfield(L, gtable, "dofile");
     lua_setfield(L, LUA_REGISTRYINDEX, "real_dofile");