Fixed mistake in .htaccess for ErrorDocument 404.

Fixed mistake in .htaccess for ErrorDocument 404.

The path of the document must begin with a leading / and consist of the full path to the document relative to the DocumentRoot (which is the virtual host root dylanstestserver.com).

Reference here:
http://serverfault.com/questions/81061/htaccess-redirect-of-404-error-just-prints-filename-doesnt-execute-file