Correctly spell "GNU Chess"

data/engines.conf

@@ -73,7 +73,7 @@ binary=glaurung
 uci-go-option-easy-0=depth 2
 uci-go-option-normal-0=depth 3
 
-[GNUchess]
+[GNU Chess]
 protocol=uci
 binary=gnuchess
 arg-easy-0=--uci

src/gnome-chess.vala

@@ -585,6 +585,10 @@ public class Application : Gtk.Application
         if (name == "human")
             return null;
 
+        /* Backwards compatibility with our old spelling of GNU Chess */
+        if (name == "GNUchess")
+            name = "GNU Chess";
+
         foreach (var p in ai_profiles)
         {
             if (name == "" || p.name == name)