repair_settings.php doesn't work without Load.php

[LiroyvH]

As per http://www.simplemachines.org/community/index.php?topic=513754.0, on Oldiesmann's request a copy here.

It appears that repair_settings.php requires Sources/Load.php to work.
Whilst that's not an issue per se, it is an issue when you move SMF to a completely new directory (eg: from "site.com/smf" to "site.com/forum").

Repair_settings.php will throw a require_once error that it cannot access Load.php and dies, making it completely unusable.
Changing the associated variables in Settings.php ($boarddir, $sourcedir, $cachedir) fixes the issue.

However, considering this is meant to be a easy to use tool to fix all kinds of Setting issues, it would help if, should Load.php be inaccessible, that the user can define (and/or let repair_settings attempt to find/guess) the completely new basedir in order to fix any other issues that would normally require repair_settings to be ran.