Sometimes I want to selectively archive all entries in a subtree with
timestamps in the past, whilst keeping all entries with timestamps in the
future.

`org-archive-subtree' only lets you selectively archive entries depending
on whether they have open TODO items.

The attached patch adds a new `org-archive-all-old' counterpart to
`org-archive-all-done' which does timestamp-selective archiving. It also
extends `org-archive-subtree' so it can optionally be invoked for
timestamp-based archiving instead of TODO-based archiving.

Toby
-- 
Dr T. S. Cubitt
Royal Society University Research Fellow
Fellow of Churchill College, Cambridge
Centre for Quantum Information
DAMTP, University of Cambridge

email: tsc25@cantab.net
web:   www.dr-qubit.org