Some code cleanup and added .config folder to gitignore

.gitignore

@@ -8,3 +8,4 @@ subprojects/lua
 subprojects/libagg
 sybprojects/lua
 lite
+.config/

src/api/system.c

@@ -434,7 +434,6 @@ static int f_list_dir(lua_State *L) {
 static int f_absolute_path(lua_State *L) {
   const char *path = luaL_checkstring(L, 1);
   char *res = realpath(path, NULL);
-  //printf("DBG: f_absolute_path() %s\n", res);
   if (!res) { return 0; }
   lua_pushstring(L, res);
   free(res);