* Add wfClone() wrapper since we're still using PHP 4 on some servers.
* Fixed installer bugs 921 and 3914 (issues with using root and so forth)
* Remove obsolete killthread.php
+* Added wfDie() wrapper, and some manual die(-1), to force the return code
+ to the shell to return nonzero when we crap out with an error.
=== Caveats ===