Tabs patch!

CHANGES
-------

 + Introduced tabs. First, we extended the menu system to support tabs. Next, a tab was added for every link that was (1) an administrative action other than the implicit 'view' (2) relevant to that particular page only. This is illustrated by the fact that all tabs are verbs and that clicking a page's tab leads you to a subpage of that page.

 + Flattened the administration menu. The tabs helped simplify the navigation menu as I could separate 'actions' from 'navigation'. In addition, I removed the 'administer > configuration'-menu, renamed 'blocks' to 'sidebars' which I hope is a bit more descriptive, and made a couple more changes. Earlier, we already renamed 'taxonomy' to 'categorization' and we move 'statistics' under 'logs'.

 + Grouped settings. All settings have been grouped under 'administer > settings'.

TODO
----

 + Update core themes: only Xtemplate default supports tabs and even those look ugly.  Need help.

 + Update contributed modules.  The menu() hook changed drastically.  Updating your code adhere the new menu() function should be 90% of the work.  Moreover, ensure that your modue's admin links are still valid and that URLs to node get updated to the new scheme ('node/view/x' -> 'node/x').

- Patch #8405 by Adrian:
   + Fixed duplicated view.
   + Fixed node types not being picked up correctly.
   + Improved error handling in case a particular node has not been found.

- Added support for 403 handling.  Patch by JonBob.  As a side benefit,
  administrators will be able to define a custom 403 page, just as they
  can define 404 pages now.

  This needs to be documented in the "Changes since / migrating to ..."
  pages.

- Patch by Steven: removed redundant permission checks.  These are no longer
  required thanks to the new 404 handling.

- Patch #5111 by Bart: fixed inconsistent default values.

- Patch 5592 by Goba: let drupal_map_assoc() rule.  :-)

- Renamed CHANGELOG to CHANGELOG.txt for Windows uses.

  Uses drupal_set_message() so the message doesn't interfeer with non-HTML
  formats (posting using blog API etc).

- Patch #5281: removed hardcoded table and CSS from the queue module.  Made
  the queue page-able.  Patch by Stefan.

- Patch 5256: code improvements: theme('header') + theme('footer') -> theme('page').
  Patch by Gerhard.

- Fixed bug 4652: node loses its terms after getting promoted, declined or expired.

- Patch 185 by Ax: fixed undefined variables, synchronized xtemplate with sf, etc.

- Committed phase 4 of JonBob's menu system changes.

- Synchronized some page and link titles.

- Committed phase 3 of JonBob's menu changes.  Adds an API for modules to
  define titles and breadcrumbs for their pages, and updates the theme
  system to display them.

- Patch by JonBob:

  Phase 2 of the menu system integration project. This unifies the interface
  used by admin and non-admin pages, and deprecates the _page hook in favor of
  explicit callbacks from menu(). Breadcrumbs, titles, and help text go away
  as a result of this patch; they will return in the phase 3 patch, printed
  by the theme.

- Committed stage 2 of the theme system improvements!  Patch by CodeMonkeyX.

- Committed stage 1 of the menu callbacks improvements.  Patch by Jonathan.

- Committed part 3 of Michael's help system improvements: removed the $help
  parameter from the menu() function.

- Bugfix: inserting and updating paths was not working.  Patch by Matt.

- Bugfix: updated the queue module menu so the "view submission" link appears
  in the navigation when enabled.  Patch by Matt.

- Help system improvements: eliminated the _system hook.  Patch by Michael.

- Bloggerapi module fixes.  Patch by Kjartan.

- Coding style fixes.  Patch by Michael.

- Help improvements and translation improvements from Michael.  Thanks!

- Committed the admin menu integration patch.  Thanks Adrian, Stefan and others.

- Cleaned up coding style and unnecessary code in bloggerapi.module.

- Removed moderation notice from queue module, it prints even when users
  are not posting from the web.

- Fixed bug #2895: locale: pager doesn't work in search

- Gerhard's uid 0 patches.  These patches bring various performance
  improvements.  Requires a database update.

- More help system updates by Michael F.

- Heavily modified version of Gerhard's patch #82: the queue module does now
  inform the user about the status of his or her post.

- Some queue module fixes by Trogeir.

- Changed some INNER JOINs back to LEFT JOINs.  Patch by Gerhard.  Not tested
  by me.

- Performance improvement: changed a fair amount of "left joins" to "inner
  joins".  Patch by Gerhard.

- Committed a slightly modified version of Slavica's table prefix patch.

- Improvements: XHTML-ifications.  Patch by GmbH.

- Removed a redundant check_input().

- Bugfix: better charset support for non-ISO-8859-1 languages.  Patch 0029.charset.fixes.patch by Al.  Could East Asia test this please.

- Bugfix: made the "moderate" field behave.  Patch 0030.queue.module.help.and.settings.form.patch by Al.

- Documentation: revised a large part of the help texts / documentation!  Al's 0024.* patches.

- Documentation: added a glossary to the help module.  Patch 0025.help.module.glossary.patch by Al and Michael.

- Usability: first step towards unifying the terminology used in the cloud module.  Patch by 0028.site.cloud.rationalize.name.patch Al.

- Usability + CSS improvements: revamped the node form and removed all tables.  Patch 0027.node.form.rewrite.patch by Al.

- CSS improvements: patch 0026.admin.css.small.improvement.patch by Al.

- Updated the MAINTAINERS file.

- Bugfix: renamed the SQL field 'types' to 'nodes' because 'types' is a reserved keyword in MySQL 4.  This fixes critical bug #1618.  Patch by Marco.

  ==> This fix requires to run update.php!

- Bugfix: made sessions work without warnings when register_globals is turned off. The solution is to use $_SESSION instead of session_register().  This fixes critical bug #1797.  Patch by Marco.

- Bugfix: sometimes error messages where being discarded when previewing a node.  Patch by Craig Courtney.

- Bugfix: fixed charset problems.  This fixes critical bug #1549.  Patch '0023.charset.patch' by Al.

- Code improvements: removed some dead code from the comment module.  Patch by Marco.

- Documentation improvements: polished the node module help texts and form descriptions.  Patch '0019.node.module.help.patch' by Al.

- CSS improvements all over the map!  Patch '0021.more.css.patch' by Al.

- GUI improvements: improved the position of Druplicon in the admin menu.  Patch '0020.admin.logo.patch' by Al.

- GUI improvements: new logos for theme Marvin and theme UnConeD.  Logos by Kristjan Jansen.

- GUI improvements: small changes to the output emitted by the profile module.  Suggestions by Steven Wittens.

- GUI improvements: small fixes to Xtemplate.  Patch '0022.xtemplate.css.patch' by Al.

TODO:

- Some modules such as the buddy list module and the annotation module in the contributions repository are also using session_register().  They should be updated.  We should setup a task on Drupal.

- There is code emitting '<div align="right">' which doesn't validate.

- Does our XML feeds validate with the charset changes?

- The forum module's SQL doesn't work properly on PostgreSQL.

- Michael Frankowski's excellent help text improvements!

- Fixed a typo in the PostgreSQL database scheme.  Patch by Michael Frankowski.

- Fixed a typo in the MSSQL database scheme.  Patch by Michael Frankowski.

- Removed dependency on "register_globals = on"!  Patches by Michael Frankowski.

  Notes:

  + Updated the patches to use $foo["bar"] instead of $foo['bar'].
  + Updated the INSTALL and CHANGELOG files as well.

- Tiny improvement to the "./scripts/code-clean.sh" script.

- Applied  Michael Caerwyn's "%s -> %d" patch.

- Changed all occurences of '%d' to %d as suggested on the mailing list.