* org-datetree.el (org-datetree--find-create): Add optional argument
MATCH-TITLE that controls whether to match REGEX-TEMPLATE against
heading title inside complex heading or to match REGEX-TEMPLATE
against the whole heading line.
* org-datetree.el (org-datetree--find-create-group,
org-datetree-find-iso-week-create): Allow finding a datetree with TODO
state, priority, tags, statistics cookies, or COMMENT keyword.
* testing/lisp/test-org-datetree.el
(test-org-datetree/find-date-create,
test-org-datetree/find-iso-week-create): Add tests for a datetree with
tags, TODO or priority keywords.
* etc/ORG-NEWS (Datetree structure headlines can now be complex):
Document the change.
* doc/org-manual.org: Update datetree definition.
005c9ae747