Add per-os op_mode field so we know what state machine to expect it to obey.

sql/database-create.sql

@@ -609,6 +609,7 @@ CREATE TABLE os_info (
   ezid tinyint(4) NOT NULL default '0',
   shared tinyint(4) NOT NULL default '0',
   mustclean tinyint(4) NOT NULL default '1',
+  op_mode varchar(20) NOT NULL default 'MINIMAL',
   PRIMARY KEY  (osname,pid)
 ) TYPE=MyISAM;