[plug] threading by subject (was: pine)

[Matt Kemner]

On Fri, 21 Sep 2001, Leon Brooks wrote:

> Just use collating equivalence between subject-empty-after-optional-list-tag
> and message-does-not-exist. No worries. (-:

Trouble is when someone sends such a message and they get a large number
of replies, also without a subject, it's diffictult to select those
messages by subject & delete.  Someone needs to teach pine about better
regexp's so I can search for [plug]$
just searching for [plug] selects half my inbox. :)

 - Matt