* Added table option variable to the SQL patch files, so now upgrading a non-standard schema won't leave your database horribly corrupted.
* Added sql.php, for sourcing SQL files with MediaWiki variable substitution.
* Disable MySQL's strict mode at session start for MySQL 4.1+, to avoid the various problems that occur when it is on.
more or less work for now.
* user_groups ur_group is now a short string key ('sysop' etc)
* groups table is gone
* user_rights table is gone
* Permissions for groups are for now set in $wgGroupPermissions.
An in-database management system could be re-added in the future
if it's really needed, but for now it's mostly just been screwing
things up.
* Group.php and Special:Groups are deprecated; will probably die.
* User group memberships are set explicitly through addGroup and
removeGroup methods instead of being re-saved on every change to
the user record.
Group keys are migrated from user_rights at upgrade time for older wikis.
The fields in prior 1.5alpha tables were too screwed up and will need to
manually have sysops re-assigned.
The Makesysop extension will need some minor tweaks.
