Added list of archived repositories which RO access to them

Currently only bf-extensions, rest of the repos will arrive soon.

scripts/svnauth/archived_repos.php

@@ -0,0 +1,5 @@
+<?php
+  $ARCHIVED_REPOS = array(
+    'bf-extensions'
+  );
+?>

scripts/svnauth/rebuild_svnauth.php

@@ -106,6 +106,14 @@ function rebuildConfiguration($what) {
 
   $authfile = array();
   $access = array();
+
+  require_once 'archived_repos.php';
+  foreach ($ARCHIVED_REPOS as $repository) {
+    $repository_pathname = "$repository:/";
+    $access[$repository_pathname]['RW'] = array();
+    $access[$repository_pathname]['RO'] = array();
+  }
+
   foreach ($repositories as $repository_id => $repository) {
     $type = $repository->getVersionControlSystem();
     if ($type == PhabricatorRepositoryType::REPOSITORY_TYPE_SVN) {