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  * There are only two throttle levels instead of 5, namely 'enabled' and 'disabled'.  This makes it a _lot_ easier to predict when the throttle will kick in.  However, if you maintain a module that is throttle-aware, it needs to be updated!

  * The throttle mechanism now uses the current number of anonymous users or the current number of authenticated users to kick in.  This is a _lot_ more intuitive than the old throttle mechanism.

  * The throttle block has been removed -- you can now use the "Who's online" block to determine the good throttle settings.

  * Most of the documentation has been removed because it was deprecated.

  * It's less code!

- Patch #11728 by Uwe Hermann: fixed some typos in the code comments, Doxygen documentation and screen output.

  Uwe: I dropped the 'iff' chunks as 'iff' stands for 'if and only if'.

- Patch #11600 by jhriggs: the module_load_all() function will currently behave unexpectedly if a module cannot be found (has been removed, renamed, etc). Once one module fails to load, all subsequent modules will not be loaded due to a short circuit condition when performing a boolean AND.

- Patch #10663 by JonBob: documentation improvements: fixed some typos and improved consistency to the use of Doxygen/api.module commands in the comments.

- Patch #9650 by Adrian: this change introduces a module_load function, which maintains a list of modules that have already been loaded in a static array, and will not load another module of the same name, or if the file does not exist.

Modules can be stored anywhere, as there is now a set of functions called module_get_filename, and module_set_filename .. which allow system_listing and module_list to specify the locations of the files.

A new function module_load_all() replaces the hardcoded includes in module_init, and loads all modules which have been enabled, using module_load.

module_listing no longer includes files itself, instead it just keeps the listing (and sets the filenames).

This patch is a requirement for the multisite configuration patch, as overriding modules are currently being loaded due to the only protection of loading them is include_once.

- Fixed bug 5440: sort() -> asort().  Suggested by Goba.

  bootstrap code.  Patch by Kjartan.

- Removed instances of the 'throttle_enable' variable.

Committed filter separation patch: all filter-related things are now in filter.module (which is a required module).
To do this cleanly, I reorganised some bits of system.module: there is now a generic handler available for simple variable-get/set based configuration pages. Look at filter_admin() or system_view() for example usage.

(based on the patch by Goba)

- Patch 0185 by Jeremy: made it possible to automatically disable modules when
  under heave load.

- Improved module loading when serving cached pages.  Moshe's bootstrap patch.

- Used legend and fieldset tags for the configuration page.

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

- Fixed some PHP "notices".

- Eliminated system_init(), the session stuff, and made it possible to
  rebuild the menu.

- Clean URL patch.

- Small improvement.  Patch by Moshe.

- Patch by Jeremy to fix a module loading bug:

    - module.inc:
       + added call to _init for all modules

    - statistics.module:
       + added statistics_init()
       + moved all global actions into statistics_init()

Patch by Natrak:

- Modules and themes now use the same functions to find and administer
  files.
- Modules can now be placed in sub-directories.
- Theme descriptions can no longer be edited. This will be handled by
  Dries' theme_conf patch.
- Update required to keep old modules enabled.

- Committed Marco's block rewrite:

   + Blocks are not longer called if not rendered: major performance
     improvement.
   + Fixed some bugs (preview option was broken, path option was broken).
   + Removed "ascii"-type blocks.
   + Added permission to for "PHP blocks"
   + ...

  NOTES:

   + You'll want to run "update.php":

       ALTER TABLE blocks DROP remove;
       ALTER TABLE blocks DROP name;

   + You'll want to update your custom modules as well as the modules in
     the contrib repository.  Block function should now read:

       function *_block($op = "list", $delta = 0) {
         if ($op == "list") {
           return array of block infos
         }
         else {
           return subject and content of $delta block
         }
       }

- updated database dump.
- removed tables modules, layout and referrer (don't forget to backup!).

  array. Thanks Moshe. (Didn't I commit this already?)

- Reverted module.inc to the old module_invoke() function.

- "module_invoke()" and "module_invoke_all()" can now be called with any
   number of arguments.  Patch by Gerhard.

- fixed comment flat list view missing 1 comment.
- changed update.php around a bit.
    * security check isn't in effect if the db hasn't been updated.
    * instructions re-organized.
    * fixed some minor updates.
- updated database.mysql done by UnConeD.
- changelog update.

- Included modules will now cause parse errors instead of them being supressed.
  Was making debugging really hard.

Committing Changes by Moshe Weitzman:
- admin_user_account(), user_edit(), and user_view() no longer have any
  hard code for authentication modules. instead authentication modules
  implement the _user hook.
- fixed a couple 'help' typos.
- linked the 'REGISTER' text in the login block to the register page.
  this page now advertises DA better if site employs DA.
- admins may now edit everything about a user account (was a feature
  request).
- user #1 may now login immediately, in addition to receiving his
  password via email.

Other changes:
- modules and themes are now enabled/disabled in the administrative /
  settings / modules | themes pages. Requires SQL update and things must
  be enabled before your site returns to normal. TODO: enable all
  functionality. (For now just do UPDATE system SET status = 1;)
- removed $themes from conf.php.
- added a $theme->system() function where theme can specify settings.
  All themes in the Drupal CVS have been updated to use this.
- added _system hook to modules. TODO: update modules to use this.
- changed strange use of sprintf to the usual strtr. The disadvantage of
  sprintf is that it requires translations to keep the string order,
  which may not be possible in all languages.
- an invalid/nonexisting theme in a user profile will now fallback to the
  BaseTheme instead of crashing.

- Applied Natrak's module improvements.

 - attempted to fixed crashes with the custom session handler.

External SMTP library
 - added functionality to have Drupal not use the default PHP mail()
   function. For more info see: http://www.drupal.org/node.php?id=44
   Note: for this to work all modules that send mails should use the
   Drupal function to send mail:
     user_mail($mail, $subject, $message, $header);

Calendar
 - added an archive page which users can use to find archives instead of
   the good old block.

Miscellaneous
 - fixed a "random" offset bug on module.inc that occurred on Windows.

All of this needs more testing, and further suggestions are welcome.

- node.module:

   + Changed node_form() to use good ol' tables instead of div/CSS-tags.

   + Revised the "revision API": I think we have both an easy and powerful
     API now that should make everyone happy.

   + Improved the usability of the rollback functionality a bit.

   + Removed the "view node" link from the "node overview" page in the
     admin section and added a "delete node" link instead.

   + Added a few missing translations; there might be missing more
     translations though.

- book.module:

   + Made the book module use the "revision API" instead of having it poke
     and use the innards and underlying details of the revision system.

- queue.module:

   + Made the queue module use the improved revision number.

- module.inc:
   + Applied Moshe's patch: added more arguments to module_invoke()

- mail-to-sql.pl:
   + Added support for more header fields and for folded fields

Notes:

- no database updates required

- A large batch of updates, amongst them a rewritten node system.  More
  information available on the mailing list.

  easier. Also changed the <? tag to <?php in some cases.

- Removed a node's link ID (lid) as discussed on the mailing list.  See
  'updates/3.00-to.x.xx.mysql' for the required MySQL updates.

- Renamed some "author" fields to "uid" fields for sake of consistency.

- Fixed the coding style of some PHP files.

- Fixed the moderation queue (fairly untested though).

- Re-introduced the temporary SQL table in _node_get().

- Added a missing 'auto_increment' to 'updates/3.00-to-x.xx.mysql'.