Freeciv

Moc generated meta source files fail to compile when the original header has the old and the new slot defined by the same name, even when conditional compiling makes sure only one of them is present at a time. Further, having them by different names, but only one of them defined at a time resulted in complains about the other one (name) to be present. The only way I got this working was to always provide both slots, and only connect signals to either one with conditional compilation.