Add "assigned_ip" to tunnels table. This is the IP that the (tunnel)

interface should be configured to. Another possibility (and one we may
switch to) is to add the IP to the interfaces table so it gets
returned in the normal ifconfig, but thats going to require a number
of cascading changes that I do not want to deal with yet.

sql/database-create.sql

@@ -762,6 +762,7 @@ CREATE TABLE tunnels (
   password varchar(32) NOT NULL default '',
   encrypt tinyint(3) unsigned NOT NULL default '0',
   compress tinyint(3) unsigned NOT NULL default '0',
+  assigned_ip varchar(32) NOT NULL default '',
   PRIMARY KEY  (pid,eid,node_id,vname)
 ) TYPE=MyISAM;