* Misc. bugs fixed in DatabaseFunctions.php and Skin.php.
* install-utils, install and update utilise Database objects instead of handling their own connections
* schema change for RC improvement -- added rc_type, rc_moved_to_title and rc_moved_to_ns
execution starts and ends in wiki.phtml, giving the code a somewhat
more predictable flow.
OutputPage.php:
* Added disable() method to Output class.
* Replaced exit() call in checkLastModified() with "return true" (thereby
altering its contract quite severly).
* reportTime() now only returns elapsed time, code with side effects
moved to logProfilingData() in GlobalFunctions.php.
GlobalFunctions.php:
* Added function logProfilingData() which does most of what
OutputPage->reportTime() used to do.
Article.php:
* Replaced exit() in checkLastModified() with "return true" (thereby altering
its contract quite severly).
* replaced implicit exit in calls to checkLastModified() and tryFileCache()
with returns.
LogPage.php:
* replaced implicit exit() with return in call to checkLastModified()
SpecialRecentchanges.php:
* replaced implicit exit() with return in call to checkLastModified()
wiki.phtml:
* Single call to logProfilingData() at the end of the request.
