[O] var `date' lacks a prefix warnings

[Martyn Jago]

Regarding the remaining Org-mode `lacks a prefix' warnings and
particularly in light of the recent message on emacs.devel [1] would it
not be sufficient to simply alias date and entry locally:

--8<---------------cut here---------------start------------->8---
(defvaralias 'org--date 'date)
(defvaralias 'org--entry 'entry)
--8<---------------cut here---------------end--------------->8---

Presumably this would be backwardly-compatible, and given a subsequent
name change in diary-lib.el a very simple integration test could catch
that very quickly.

If I get a positive response I can perhaps look at a patch and tests,
but if my understanding is amiss I will appreciate the heads-up.

Best, Martyn

p.s. I should point out that my personal view is that a serious well
maintained Emacs library such as Org-mode should have a zero warning
policy for official releases.

Footnotes: 
[1]  From: Chong Yidong <address@hidden>
     Subject: Evil defvars in org.el
     Newsgroups: gmane.emacs.devel
     To: Bastien Guerry <address@hidden>
     Cc: address@hidden
     Date: Fri, 27 Apr 2012 11:17:37 +0800 (9 hours, 36 minutes, 57 seconds ago)