#304163 by chx: Allow update.php to re-generate settings.php. Now possible to upgrade Drupal 6 to Drupal 7. Oh, yeah.

- Patch #382096 by Arancaytar: improve the form limits so that they actually make sense and don't get in the way of SQLite support.

#125030 by kkaefer, quicksketch, dvessel, Steven, and John Resig: Allow compatibility with other JavaScript libraries.

#355496 by geodaniel, Dave Reid: Always list available databases, with explanation when only one is in the list.

#363013 by mannkind: Use getwd() rather than realpath(__FILE__) to determine drupal root, so we don't break symlinks.

#368729 by meba: (i18n sprint) Fix error during multilingual installation because of NULL value on required field.

#362423 by chx: Include session.inc during installer to avoid fatal errors if things don't go exactly according to plan.

#203323 by JirkaRybka, robertgarrigos, thePanz, c960657, and sun: Fix undefined index locale in install.php and clean up crufty code.

- Patch #201122 by c960657, Moshe Weitzman: never write anonymous sessions, unless something has been written to . This is an important performance improvements -- as long as you use modules that use  carefully. It might be good to report some analytics about this in the performance settings page so administrators can see if there is a 'broken' module.

- Patch #352722 by dmitrig01: conditionally show 'settings.php not writable' error so that the message doesn't show up when the file does not exist.

- Patch #333143 by justinrandell: cleaning up the Drupal bootstrap code, removing bootstrap flag in system table.

#11077 by mfb, KarenS, macgirvin, and jjkd: Can you say Daylight Savings Time? I bet you didn't think Drupal ever would! :)

- Patch #74645 by drewish, roychri et al: modify file_scan_directory to use a regex for the nomask (and code clean-up).

- Patch #208793 by kbahey, Damien Tournoud: stop hardcoding the HTTP protocol version where possible.

- Patch #302763 by Dave Reid, Rob Loach: replace time() by ['REQUEST_TIME'] as per Rasmus' suggestion.  Removed drupal_referrer() for consistency.

- Patch #225450 by Crell, chx, bjaspan, catch, swentel, recidive et al: next generation database layer for Drupal 7.

- Patch #252013 by Eaton, pwolanin, Susurrus et al: drupal_render() now printes #markup, not #value.