#170638 by JirkaRybka and chx: move update access variable to settings.php, so we can check whether it is wide open, and we have one place for settings

- Patch #99011 by merlinofchaos: remove sites/default/settings.php and ship with sites/default/default.settings.php.

by Moshe Weitzman, webernet, chx, erdemkose and myself

- Patch #117917 by chx, greg, webchick et al: fix problems with the automatic domain extraction  -- prevents users from logging in.

- Make installer code integrate better with module.inc / system.module
- Fix schema version bug when installing core

- Fix locations links in watchdog
- Fix repeated subdirectory in page cache CIDs

- Modified patch #43709 by chx, Eaton et al.: usability improvement: put some emphasis on the no trailing slash requirement.

- Patch #38841 by Morbus/Ber: improved documentation about $base_url and rolled back auto-detection.