fix name of config variables.

src/kernel/dbsqlite.c

@@ -91,8 +91,8 @@ void db_open(void)
     int err;
     const char *dbname;
 
-    g_order_batchsize = config_get_int("config.db_batch", 100);
-    dbname = config_get("config.db_name");
+    g_order_batchsize = config_get_int("game.dbbatch", 100);
+    dbname = config_get("game.dbname");
     if (!dbname) {
         dbname = "";
     }

src/main.c

@@ -86,6 +86,8 @@ static const char * valid_keys[] = {
     "game.mailcmd",
     "game.era",
     "game.sender",
+    "game.dbname",
+    "game.dbbatch",
     "editor.color",
     "editor.codepage",
     "editor.population.",