* remove require_once() throughout whole code, yet left in few places
* move global functions in HttpUtils, ProxyTools, Credits to class methods
* php5 only: __autoload() now used, combined with class->file map and require()
* move initialization of $wgValidSkinNames to Skin::getSkinNames()
* few more changes that will surely break stuff.
Inserting a newline into some improperly filtered option strings could be used to overwrite other pref values, bypassing their input validation. Any newlines now get filtered out at User::setOption as a final line of defence.
There were a few HTML injection bugs, but none appear to be exploitable, as prefs can only be set if you already control the account.
Bug found by gmaxwell.
to debugging issues. (Keep this?)
* Use __FILE__ to form path in new LocalSettings.php, so it stays accurate
when the directory is relocated for typical usage.
* Auto-update $wgCacheEpoch when LocalSettings.php changes on new installs.
For typical usage this will be a light burden and should reduce confusion
when the configuration is edited.
* Fix $wgCacheEpoch's effect on client-side caching.
Further testing indicates the problem was probably an incomplete sync or bad caching of
OutputPage.php on some servers, so the broken version of the function was called
on old page views, incorrectly storing old text items into the parser cache.
* (bug 4104) 'OutputPageBeforeHTML' hook to postprocess article HTML on
page view (comes after parser cache, if used). Patch by ThomasV.
Something still bugged in this; was saving bogus history entries to parser cache.
* Ended the role of $wgLinkCache in link updates. Instead, links (and related entities) are registered in the ParserOutput object during a parse. The LinksUpdate constructor now takes a ParserOutput object as a parameter. $wgLinkCache is still used, but only as a cache of article IDs.
* Because the link list is now saved and restored in the parser cache, meta tag keywords now work on parser cache hits. Some refactoring took place in this area.
* Rendering of the HTML for category links has moved from Parser to OutputPage.
* Did some general pottering around in Article.php, such as allowing an Article object to be created with a specified revision ID, thereby optionally removing the dependence on $wgRequest. Not used at the current time.
* A few documentation tweaks.
