#255 built-in automatic discard

[Tokio Kikuchi]

This patch is a revision of #636412 (discard old
pending post) script. While the script was to be run by
cron, this patch gives full feature of

1. site wide default of MAX_DAYS_TO_HOLD in Defaults.py
(mm_cfg.py).

2. list admin can set list specific max_days_to_hold
through Web GUI

3. integreate in cron/checkdbs and reports the number
of discarded messages.

[Tokio Kikuchi]

auto_discard.patch

[Tokio Kikuchi]

Logged In: YES
user_id=67709

This patch was merged in CVS.

[Oliver Schulze]

Logged In: YES
user_id=70599
Originator: NO

Why is this patch not applied?

[Tokio Kikuchi]

Logged In: YES
user_id=67709
Originator: YES

It was applied and merged in the official releases after 2.1.6. I forgot to mark 'accepted' in the 'Resolution' box.