tweak to make cache pages show multi-sever setting, a=chris

diff --git a/src/controllers/CrawlController.php b/src/controllers/CrawlController.php
index 06b7dd1d1..59f8009e1 100644
--- a/src/controllers/CrawlController.php
+++ b/src/controllers/CrawlController.php
@@ -248,7 +248,8 @@ class CrawlController extends Controller implements CrawlConstants
             if (count($lookup_info) == 2 && !empty($lookup_info[0]) &&
                 ($lookup_info[0][0] === 'h'
                 || $lookup_info[0][0] === 'r'
-                || $lookup_info[0][0] === 'g')) {
+                || $lookup_info[0][0] === 'g') ||
+                strncmp($lookup_info[0], "cache:", 6) == 0) {
                 $our_lookups[$lookup] = $lookup_info;
             } else {
                 $our_lookups[$lookup] = [];