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Drupal's existing caching mechanism doesn't perform well on highly dynamic websites in which the cache is flushed frequently. One example is a site that is under attack by a spambot that is posting spam comments every few seconds, causing all cached pages to be flushed every few seconds.  Loose caching immediately flushes the cache only for specific users who have modified cached data (whether or not they are logged in), delaying the flushing of data for other users by several minutes.

(I rewrote the help text a bit and made minor changes to the code comments.)

- Patch #20188 by Goba: Node_feed() instructs the nodeapi view call it invokes to deal with the body of the node, but afterwards it only uses the teaser to generate the feed. So the nodeapi hook should be called with teaser processing in mind. This simple patch fixes that.

This patch adds folksonomy support to Drupal (named internally as "Free tagging"). In a nutshell, the core difference is the input method: unlike normal taxonomies which are administratively controlled, a "free tagging" vocabulary allows tag creation when the node is submitted. It does this through an text input box, as opposed to a dropdown or selectbox. This patch:

    * Removes the useless "Preview form" of a vocabulary.
    * Alters the vocabulary table to include a new "tags" column.
    * Adds a new "Free tagging" preference on vocabulary creation/editing.
    * Modifies the vocabulary overview to support pagers for free tagging vocabs.

The new code integrates tightly with the existing taxonomy code. The only additional processing occurs on node save and edit, where we parse through the tags associated with a node. All other display (and thus, code) remains the same.

- Modified patch #18215 by ankur: make sure the comment statistics update after approval in the moderation queue.

- Fix bug in decode_entities() with double-escaped entities.

- By default, do not show comment controls.

- Patch #20103 by Neil: Removing another place where we have hard coded HTML instead of the form functions.  The unpublish selection actually didn't seem to work, so I removed it since we have delete. It should be implemented as a link anyway.

- Patch #18828 by me, jbond and TDobes: moves the textarea hook for 'pre' between the title and the textarea. This makes it easier for simply textarea enhancements like quicktags to add a toolbar just above the textarea.

- Modified patch #19694 by chx: makes sure that block.module deals by default only with regions 0 and 1 as it does now but lets you use block_list with any region you define. This opens many possibilites. You may do a multi region module, with your admin UI using the blocks table as storage and the block_list matcher. Or you may do a sections module using the block matcher without cluttering the current blocks list.

- Patch #19768 by danielc: line 593 in version 1.109 of database.pgsql is problematic. The line creates a unique index for sid. But, sid is already a primary key so doesn't need a unique index on it. Let alone, the syntax is wrong due to wrapping the table name in {}'s. This patch removes the line.

- Patch #19895 by Moshe: currently modules can inadvertently load all other modules during the bootstrap. this is easy to do by calling a node_load() or module_invoke_all(). this degrades performance for anonymous users when caching is enabled.  With this patch, the module writer will see an php error like "Call to undefined function: drupal_set_html_head()" if this is attempted. basically, unavailable functions are actually reported as unavailable.