Bring the definition for roottags into sync with the actual database.

sql/database-create.sql

@@ -1643,7 +1643,7 @@ CREATE TABLE widearea_recent (
 
 CREATE TABLE widearea_updates (
   IP varchar(15) NOT NULL default '1.1.1.1',
-  roottag tinytext NOT NULL default '',
+  roottag tinytext NOT NULL,
   update_requested datetime NOT NULL default '0000-00-00 00:00:00',
   update_started datetime default NULL,
   PRIMARY KEY  (IP)

sql/database-migrate.txt

@@ -662,3 +662,6 @@ last_net_act,last_cpu_act,last_ext_act);
 	page. The records are dynamic; someone like Dave will insert
 	them, and the web page will remove them after a node
 	sucessfully updates.
+
+1.155: Bring the definition for the roottag column into sync with what's in
+       the database on boss - no database changes required.