are replaced with .include "../../devel/readline/buildlink3.mk", and
USE_GNU_READLINE are removed,
* .include "../../devel/readline/buildlink3.mk" without USE_GNU_READLINE
are replaced with .include "../../mk/readline.buildlink3.mk".
TODO lists, in the local directory or elsewhere, to assign priorities and
start/end dates, to send nag mails for todos or to generate reports of
done items by date.