Simpler rewriting config with apache

Hi, this is just to let you know that apache httpd 2.2.16 supports the [FallbackResource directive](https://httpd.apache.org/docs/trunk/en/mod/mod_dir.html#fallbackresource), so instead of requiring and enabling mod_rewrite, all that is needed is mod_dir, so:

FallbackResource /index.php

Start by locating the Apache configuration or setup documentation for PHP-Router and compare its current mod_rewrite guidance with the reported FallbackResource directive. Done means the documented Apache setup reflects the simpler mod_dir-based configuration where appropriate; the issue does not name a specific file or test.

Written by the indexing model from the issue text.