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- Added a simple contact module to core.

  changes are:

  1. Simplified the statistics pages: there are less pages and on the
     remaining pages there is a lot less visual clutter (less columns and
     better presentation).

  2. Reorganized the 'administer - logs' menu: flattened the menu structure
     and removed a number of links.

  3. Improved performance.  Most statistics pages used about 160 slow SQL
     queries which made the statistics pages fairly unusable on my system.
     The new pages use at least 10 times less SQL queries and render much
     faster.  They are actually usable.

  4. There is now a 'track'-tab on node pages, and a second subtrab on the
     user accounts 'track'-tab for people with the 'access statistics'
     permission.  They can be used to resp. track the node and the user.
     This makes the statistics more accessible.

  5. Changed the way watchdog messages are filtered.  This makes it easier
     to introduce new watchdog types.

  6. Reworked the statistics module's permissions.

  7. Less code: 223 insertions(+), 343 deletions(-).

  8. Fixed several glitches: for example, the statistics pages sorted the
     'Name' column by user ID instead of by name.  Unfortunately, it is
     too difficult to backport these to DRUPAL-4-5.

  TODO:

  1. Review the statistics modules help pages.

  2. Help fine-tune the interfaces/views.

  NOTES:

  1. You'll want to run update.php.

    + added support for multi-site configurations.
    + tidied up some old cruft and added code comments.

- Added generic flood control mechanism to throttle certain operations per hostname (eg. posting comments, requesting passwords, sending e-mails).  See flood_register_event() and flood_is_allowed() for details.

  * 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!

1) Clean up the text analyser: make it handle UTF-8 and all sorts of characters. The word splitter now does intelligent splitting into words and supports all Unicode characters. It has smart handling of acronyms, URLs, dates, ...

2) It now indexes the filtered output, which means it can take advantage of HTML tags. Meaningful tags (headers, strong, em, ...) are analysed and used to boost certain words scores. This has the side-effect of allowing the indexing of PHP nodes.

3) Link analyser for node links. The HTML analyser also checks for links. If they point to a node on the current site (handles path aliases) then the link's words are counted as part of the target node. This helps bring out commonly linked FAQs and answers to the top of the results.

4) Index comments along with the node. This means that the search can make a difference between a single node/comment about 'X' and a whole thread about 'X'. It also makes the search results much shorter and more relevant (before this patch, comments were even shown first).

5) We now keep track of total counts as well as a per item count for a word. This allows us to divide the word score by the total before adding up the scores for different words, and automatically makes noisewords have less influence than rare words. This dramatically improves the relevancy of multiword searches. This also makes the disadvantage of now using OR searching instead of AND searching less problematic.

6) Includes support for text preprocessors through a hook. This is required to index Chinese and Japanese, because these languages do not use spaces between words. An external utility can be used to split these into words through a simple wrapper module. Other uses could be spell checking (although it would have no UI).

7) Indexing is now regulated: only a certain amount of items will be indexed per cron run. This prevents PHP from running out of memory or timing out. This also makes the reindexing required for this patch automatic. I also added an index coverage estimate to the search admin screen.

8) Code cleanup! Moved all the search stuff from common.inc into search.module, rewired some hooks and simplified the functions used. The search form and results now also use valid XHTML and form_ functions. The search admin was moved from search/configure to admin/search for consistency.

9) Improved search output: we also show much more info per item: date, author, node type, amount of comments and a cool dynamic excerpt à la Google. The search form is now much more simpler and the help is only displayed as tips when no search results are found.

10) By moving all search logic to SQL, I was able to add a pager to the search results. This improves usability and performance dramatically.

- Updating the date.

- Added a note about PostgreSQL no longer depending on PEAR.

- Added small note about PHP5 compatibility.

- Added a note about the forum module performance improvements.

- Small change to the wording of the 'note'.

- Patch #9543 by JonBob: added node-level access control!

- Patch #5347 by JonBob:

Here's a new patch that unifies the node/52 and book/view/52 paths for nodes. It involves a small change to hook_view(), which is discussed first:

Currently hook_view() expects node modules to return a themed node. However, each module does this the same way; they modify $node as necessary, then call theme('node', $node) and return the result. We can refactor this so that the calling function node_view() calls theme('node') instead. By doing this, it becomes possible for hook_nodeapi('view') to be called after hook_view() where the node contents are filtered, and before theme('node') where the body is enclosed in other HTML. This way the book module can insert its navigation into the body right before the theming.

Advantages of this refactoring:
- I can use it for book.module to remove the extra viewing path.
- The function of hook_nodeapi('view') becomes more like hook_view(), as neither will expect a return value.
- We more closely follow the flow of other nodeapi calls, which usually directly follow their corresponding specific node type hooks (instead of preceding them).
- The attachment.module people could use it to append their attachments in a list after the node.
- Gabor could use it instead of his filter perversion for his "articles in a series" module.
- A little less code in each view hook.
- The content hook is no longer needed, so that means even less code.

Disadvantages:
- Any modules written to use nodeapi('view') could be affected (but these would all be post-4.4 modules).
- Implementations of hook_view() would need to be updated (but return values would be ignored, so most would work without updates anyway).

Now the patch takes advantage of this API shift to inject its navigation at the end of all book nodes, regardless of the viewing path. In fact, since the paths become identical, I've removed the book/view handler entirely. We should probably provide an .htaccess rewrite for this (one is still needed for node/view/nn anyway). At the same time, there is a check in book_block() that shows the block appropriately on these pages.

- Added URL aliases for 'index.rdf' and 'rss.xml'.  Google, Feedster and
  possibly other crawlers try fetching these frequently as can be seen
  from the watchdog logs.  Made possible by the recent path module change.

- Patch #8509 by Killes and Steven: added support for sending compressed
  pages.  Useful to reduce your site's bandwidth.

- Changed the way status messages are printed as per Kristjan's suggestion:
  http://drupal.org/files/issues/error_messages_list.png (issue #9138).

  drupal_set_message() has been changed to group message by type and a
  helper function, theme_status_message(), is added to display the messages.
  Chameleon and Xtemplate have been updated to use this new function.

- Updated CHANGELOG.txt.

- Patch #8382 by jseng/junyor: allows autodiscovery of BloggerAPI via RSD.

- Patch #7350 by Mathias: return part a taxonomy tree to a user-defined
  depth/level.

- Updated CHANGELOG.txt.

- Made it possible for anonymous users to leave their name, e-mail address
  and the URL of their homepage.  Patch by Pablo.