php/index.php: Add check to see if config.php exists (i.e. the interface has been configured) and print up a message if not.
php/index.php: Add check to see if config.php exists (i.e. the interface has been configured) and print up a message if not.

git-svn-id: 5a113f46df058f8047e288f4f3e948d899353d9a@343 410355f2-c4ea-45de-a5b5-301721f902b9

mwcampbell/prs,mwcampbell/prs,mwcampbell/prs