Convert ZT gamename to lower case (#5110)

Source/DiabloUI/selgame.cpp

@@ -613,6 +613,9 @@ void selgame_Password_Select(int /*value*/)
 
 	if (selgame_selectedGame > 1) {
 		if (provider == SELCONN_ZT) {
+			for (unsigned int i = 0; i < (sizeof(selgame_Ip) / sizeof(selgame_Ip[0])); i++) {
+				selgame_Ip[i] = (selgame_Ip[i] >= 'A' && selgame_Ip[i] <= 'Z') ? selgame_Ip[i] + 'a' - 'A' : selgame_Ip[i];
+			}
 			strcpy(sgOptions.Network.szPreviousZTGame, selgame_Ip);
 		} else {
 			strcpy(sgOptions.Network.szPreviousHost, selgame_Ip);