Index: CHANGELOG.txt
===================================================================
RCS file: /cvs/drupal/drupal/CHANGELOG.txt,v
retrieving revision 1.253.2.14
diff -u -p -r1.253.2.14 CHANGELOG.txt
--- CHANGELOG.txt	8 Oct 2008 20:47:04 -0000	1.253.2.14
+++ CHANGELOG.txt	10 Oct 2008 07:02:13 -0000
@@ -2,6 +2,8 @@
 
 Drupal 6.6-dev, xxxx-xx-xx (development release)
 ----------------------
+- Added aliased multi-site support:
+    * Added support for mapping domain names to sites directories.
 
 Drupal 6.5, 2008-10-08
 ----------------------
Index: includes/bootstrap.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/bootstrap.inc,v
retrieving revision 1.206.2.4
diff -u -p -r1.206.2.4 bootstrap.inc
--- includes/bootstrap.inc	18 Aug 2008 18:56:30 -0000	1.206.2.4
+++ includes/bootstrap.inc	10 Oct 2008 07:02:13 -0000
@@ -218,6 +218,30 @@ function timer_stop($name) {
  *
  * 13. $confdir/default
  *
+ * If a file named sites.php is present in the $confdir, it will be loaded
+ * prior to scanning for directories.  It should define an associative array
+ * named $sites, which maps domains to directories.  It should be in the form
+ * of:
+ *
+ * $sites = array(
+ *   'The normally publicly accessible domain' => 'A directory within the sites directory'
+ * );
+ *
+ * For example:
+ *
+ * $sites = array(
+ *   'devexample.com'    => 'example.com',
+ *   'mymachine/example'  => 'example.com'
+ * );
+ *
+ * The above array will cause Drupal to look for a directory named
+ * "example.com" in the sites directory whenever a request comes from
+ * "example.com", "devexample.com", or "mymachine/example". That is useful
+ * on development servers, where the domain name may not be the same as the
+ * domain of the live server.  Since Drupal stores file paths into the database
+ * (files, system table, etc.) this will ensure the paths are correct while
+ * accessed on development servers.
+ *
  * @param $require_settings
  *   Only configuration directories with an existing settings.php file
  *   will be recognized. Defaults to TRUE. During initial installation,
@@ -237,11 +261,19 @@ function conf_path($require_settings = T
   }
 
   $confdir = 'sites';
+  if (file_exists($confdir . '/sites.php')) {
+    // This will overwrite $sites with the desired mappings.
+    include($confdir . '/sites.php');
+  }
+
   $uri = explode('/', $_SERVER['SCRIPT_NAME'] ? $_SERVER['SCRIPT_NAME'] : $_SERVER['SCRIPT_FILENAME']);
   $server = explode('.', implode('.', array_reverse(explode(':', rtrim($_SERVER['HTTP_HOST'], '.')))));
   for ($i = count($uri) - 1; $i > 0; $i--) {
     for ($j = count($server); $j > 0; $j--) {
       $dir = implode('.', array_slice($server, -$j)) . implode('.', array_slice($uri, 0, $i));
+      if (isset($sites[$dir]) && file_exists($confdir . '/' . $sites[$dir])) {
+        $dir = $sites[$dir];
+      }
       if (file_exists("$confdir/$dir/settings.php") || (!$require_settings && file_exists("$confdir/$dir"))) {
         $conf = "$confdir/$dir";
         return $conf;