* Don't set $IP. The entry point already sets it, so there's no point. Users can still set it if they can figure out a way to do it without breaking things.
* Don't include DefaultSettings.php. Doing that is code, not configuration, and it can easily be done in WebStart/Maintenance. Some non-standard entry points in extensions may be broken by this. That's their fault for being non-standard. Backwards compatibility is preserved thanks to require_once().
* Introduce $wgInvalidateCacheOnLocalSettingsChange, which when set, causes $wgCacheEpoch to be updated in the way that it previously was in the default LocalSettings.php.
* Don't set $wgLocalInterwiki to some nonsense value (possibly including spaces and punctuation in the new installer). It should be only for actual interwiki prefixes. Since most wikis don't have them, I set this to false by default and adjusted the referring code to accept this.
* Removed the guard for web invocation with $wgCommandLineMode set. This ancient code is redundant with modern protections in doMaintenance.php.
* In DefaultSettings.php, fixed fold terminator placement near $wgLoadScript
* Add a web entry point guard. That's one piece of code which really is necessary.
* This is not complete yet, and should not be used outside of testing. Using it on a production database may ruin everything. This is the reason for the second entry point of new-index.php. You've been warned.
* Known issues are at [[mw:New-installer_issues]]. Please add new items to the list if you find them.
* (bug 2658) Don't use the TZ environment variable at all. Setting it throws an error in some restricted setups. But using it in PHP 5.1+ doesn't make sense anyway, since you'll get the E_STRICT notice described above whenever PHP tries to access it, because Derick hates environment variables. Use date_default_timezone_set().
* If $wgLocaltimezone is null, use the server's timezone as the default for signatures. This was always the behaviour documented in DefaultSettings.php but has not been the actual behaviour for some time: instead, UTC was used by default.
* Reverted HttpFunctions.php to r45549 and renamed wgSyncHTTPTimeout back to wgHTTPTimeout
* Edited out the asynchronous features from UploadFromUrl. Made fetchFile() use the curlCopy() function from new-upload r47811 instead of Http::doDownload(). Wrote my own URL validity check to avoid having to use either of the two buggy precedents.
* Removed UploadFromChunk
* Removed chunk upload and background status from ApiUpload.php
* Reverted r54669, use of addScriptClass()
* Left getHeadScripts() in its current location (OutputPage) instead of moving it back to SkinTemplate, just added wikibits.js to it to replace the removed addCoreScripts2Top()
* put a @ in front of get_headers() should hopefully avoid errors where allow_url_fopen=0
* combined $wgPhpCliPath into the similar used $wgPhpCli var
* minor js & example file mwEmbed fixes
* Remove all $wgAllowRealName, check $wgHiddenPrefs instead
* Make $wgAllowUserSkin obsolete too, check $wgHiddenPrefs instead
* And also only call globals if really needed, and remove unused globals
