- Patch #15247 by Drumm: simplified the logout code.

  + After mailing the password, set a message and go to the login form (was print a message as the entire page).
  + Provide feedback if neither field was filled in.
  + Make it a full menu callback instead of going through user_page().
  + Fixed some indentation.
  + Changed some double quotes to single quotes.
  + Made sure all if statements have {}.

- Small bugfix + small improvement.

1) The different types of search, which used to be radio button options in the search form, are now subtabs of "search" (default "search/node"). This seems better from a UI point of view, but also has another advantage: modules which implement a custom search form (flexinode, project) can add it as a subtab of search. This means that all search forms will be located in the same place, and also without needing an extra api call to search.module.

2) The current code was a bit hackish, as the indexing of comments along with nodes was hardcoded in node.module. Instead, I created a nodeapi operation "update index" which allows modules to add more data for a node that is being indexed. Comments are now indexed using this mechanism and from comment.module, which is a lot cleaner.

3) The search results format was also hardcoded to include "N comments". I replaced this with a nodeapi operation "search result" and moved the comment code to comment.module where it belongs. This op is quite useful, as for example I also modified upload.module to add "N attachments" to a search result if any are present.

- Patch #13020 by chx: let Drupal handle multiple database layers.

- Removed the PEAR database backend.  It's no longer being used/maintained.

- Patch #14890: corrected the documentation of conf_init().

- Made the ping module ping pingomatic.com, which in turn, will ping all the major ping services.
  Less code to ping more services.

- Patch #14710 by tangent: only show post button if preview is optional or if we are in preview mode.  We show the post button in preview mode even if there are form errors so that optional form elements (e.g., captcha) can be updated in preview mode.

- Patch #14614 by Neil: made the archive module respect the node-level permissions.

- Bugfix: the book module incorrectly assumed that there is an active revision if n.moderate = 0.  We can (and need) to rewrite this when the revision changes hit core.  In essence, we need an efficient query to retrieve the 'last puslished revision that is not in the moderation queue'.

- Patch #14262 by Richard: help text improvements for the tracker module.

   * Less logic in theme code.
   * Encourages use of the menu system.
   * Easier to find where a title or breadcrumb comes from in other people's code because there are less places to look. Look in menu and then grep for the appropriate set function. Looking for calls to theme_page() is hard because there are too many of them.
   * Very slightly more efficient.

- Patch #14288 by Goba: "the archive module calendar indexes the array used to build up the header cells by the short names of the days. In Hungary, we have both Wednesday and Sunday start with the same two letters, so if I translate the short versions with the same two letters, the second associative array index will overwrite the first. The obvious soluion was to swap the array, and index by the full day name, which is expected to be unique in all languages."