Add 'external_resource_key' to reserved table for protogeni cooked

mode.

sql/database-create.sql

@@ -3246,6 +3246,7 @@ CREATE TABLE `reserved` (
   `genisliver_idx` int(10) unsigned default NULL,
   `external_resource_index` int(10) unsigned default NULL,
   `external_resource_id` tinytext,
+  `external_resource_key` tinytext,
   `tmcd_redirect` tinytext,
   `sharing_mode` varchar(32) default NULL,
   PRIMARY KEY  (`node_id`),

sql/updates/4/228

+#
+# Add extenal references slots to nodes table, as for geni.
+#
+use strict;
+use libdb;
+
+sub DoUpdate($$$)
+{
+    my ($dbhandle, $dbname, $version) = @_;
+
+    if (!DBSlotExists("reserved", "external_resource_key")) {
+	DBQueryFatal("alter table reserved add ".
+		     "external_resource_key tinytext ".
+		     "after external_resource_id");
+    }
+    return 0;
+}
+1;