allow override of core in require'd script

[plb]

As mentioned here: http://userspice.org/forums/topic/verify...#post-2055

It is currently possible to override "pages" but it is not possible to override scripts which are brought into other pages by means of require_once() or the related include*() and require*() functions...

I believe that by changing the require_once() calls from absolute to relative:

Code:

require_once('header.php');

instead of

Code:

require_once($us_url_root.'users/includes/header.php');

and then making judicious use of

Code:

include_path

(presumably configured in init.php during installation) you could make these over-ridable.

Of course the disadvantage is the code becomes a bit less readable and you will suffer a bit of a performance hit (I would guess negligible).