programs
--------
id
name varchar(254)
url varchar(254)

patch_versions
--------------
id
patch_id int ref(patches(id)) 
comment memo
version int

patches
-------
id
program_id int ref(programs(id))
title varchar(254) notnull default('')
applied_since_version varchar(20)
description memo notnull
created_at datetime
created_by varchar(20)
updated_at datetime
updated_by varchar(20)