New php utility to aid in the configuration of index.php by using an html form to...

New php utility to aid in the configuration of index.php by using an html form to choose the options. For now it produces a file named defaults.php, but identical in format to the current index.php so that it can still be edited by hand. (This is not finished yet, it only handles about a quarter of index.php's settings.)

git-svn-id: svn://svn.code.sf.net/p/phpwiki/code/trunk@2147 96ab9672-09ca-45d6-a79d-3d69d39ca109