info: make architures sections into subsections

Signed-off-by: Mattias Andrée <maandree@operamail.com>
discussion: cleaning up after applications

Signed-off-by: Mattias Andrée <maandree@operamail.com>
discussion: x.org: not threaded, cannot upgrade online

Signed-off-by: Mattias Andrée <maandree@operamail.com>
input issues in x.org

Signed-off-by: Mattias Andrée <maandree@operamail.com>