#178768 follow up patch by myself: now that we know Drupal module is moved to...

#178768 follow up patch by myself: now that we know Drupal module is moved to site_network, we can document is in the changelog

CHANGELOG.txt

@@ -88,6 +88,8 @@ Drupal 6.0, xxxx-xx-xx (development version)
 - Upgraded the core JavaScript library to jQuery version 1.2.
 - Added a new Schema API, which provides built-in support for core and
   contributed modules to work with databases other than MySQL.
+- Removed drupal.module. The functionality lives on as the Site network
+  contributed module (http://drupal.org/project/site_network).
 
 Drupal 5.0, 2007-01-15
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