The only two usages left since r91590 are php version checks for index/load/api.php, and $wgAPIEnabled check in api.php. Consolidate all of the "bailing for invalid version" into PHPVersionError.php. Leaving $wgAPIEnabled as the only user was silly, so just echo and die like wfDie() would've done
* Added the ability to compile extensions. The build process is bootstrapped by running MediaWiki in interpreted mode. Extension setup file inclusions are slightly modified in a way that makes them register themselves for compilation. Then the same LocalSettings.php uses the compiled extension setup file when the compiled binary runs.
* Tested with Cite and ParserFunctions. The code which lets you have an extensions directory in a place other than $IP/../extensions is untested.
* Simplified WebStart.php slightly by using a custom $_SERVER variable to mark compiled mode. It will break if you don't use the supplied server.conf, but that will break a lot of things so don't do that.
* Fixed the core web entry points to include WebStart.php in compiled mode instead of interpreted.
* Made the build directory configurable. This is mostly so that I can grep the source tree without seeing loads of generated C++.
* In server.conf, added a rewrite rule allowing a /wiki/$1 article path.
* Removed server.conf log file location "/dev/stdout", breaks when you switch user
* Disable static content cache, breaks horribly when you set SourceRoot to a directory containing 7GB of files.
* Rewrote the run-server script in PHP, mostly to support the configurable build directory feature.
* Added an option to the run-server script to allow running in interpreted (hphpi) mode.
* Fix parsing of the three major entry points (index.php, api.php, load.php) back to PHP 4.4.9. We don't care what happens if you actually try to run these files on old versions, but the entry files need to parse correctly.
* consign /includes/templates/PHP4.php and /includes/templates/NoLocalSettings.php to the fiery pit of hell where they belong.
* Prevent loading of any other files for PHP < 5. WebStart.php was rendered unparseable in PHP 4 by the introduction of try/catch blocks in r85327.
* Die outright with a pretty error message on PHP < 5.2.3 as well as PHP 4. All versions of PHP below that throw parse errors of various sorts.
* Reimplement wfDie() to provide an entry-point-dependent die-with-readable-error-message function (for instance, we want a pretty human-readable page in index.php, something wrapped in CSS/JS /*...*/ comment block in load.php, etc).
* Standardise the appearance of the catastrophic errors thrown at the top of the stack with the ones lower down (exception-within-exception, etc). There isn't really a way to do this without duplication, AFAICT.
