- Patch #353883 by Damien Tournoud, killes, et al: converted queries to the new database abstraction layer.

- Patch #309586 by mr.baileys: IP address from XFF header contains spaces and improved code comments.

#343999 by Crell, chx, and Alexander Pas: Add facility for doing NULL / NOT NULL conditions to DBTNG.

- Patch #373613 by drewish, quicksketch: working around some Debian issues.  They ship a different GD library.

  times (such as crop, scale, then desaturate) without quality loss, we need to
  pass images by their raw GD (or other library) resources rather than re-opening
  the same image repeatedly, which causes wasted processing and loss of quality when
  using JPEG images.  This patch reworks the image toolkits, adds some new image
  manipulations and adds some impressive SimpleTests.

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

#91250 by ontwerpwerk, hass, profix898, Rob Loach, and mfer: Allow drupal_add_js() to reference external JavaScript files.

#349671 by Damien Tournoud and Josh Waihi: Make the PostgreSQL driver independent of schema to fix D6 => D7 update.

#330983 by recidive and boombatower: Rename users/users_roles tables to user/user_role for consistency.

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

- Patch #298722 by pwolanin: _menu_translate returns FALSE before to_arg is available.  Drupal.org upgrade blocker.

#348627 by smk-ka and catch: Allow menu title callback property to bypass t() (+documentation and tests)