Re: future wishes - ACAP and LDAP support

[Paul Franklin <paul@cs.washington.edu>]

Lars asked for comments, so I figure I'll share mine.

Here's a more concrete proposal which builds on Hrvoje's ideas...
	(if I only had time to code)

nnmail-spool-methods becomes a server variable, containing a list of
methods.  We start with the following methods, so that implementing
spool methods isn't an issue yet:

* default (old behavior--chooses between simple & movemail)
* simple (emacs does everything itself)
* movemail (calls external movemail program)

	These all take the same string as nnmail-spool-file does,
		which defaults to the same things as nnmail-spool-file.
	Also, movemail can take a second string--a path to movemail.

* vmpop (calls vm's pop code, which many folks say works well)
	This one takes the same string that vmpop does.
		[Sidenote--does vmpop stash its password someplace
		secure after prompting for it?]

So I might have this in my nnml server definition:

	(nnmail-spool-methods
		(simple "~/Gnus/outgoing")
		(vmpop "pop.cs.washingon.edu:110:pass:paul:*"))

Then, of course, there's backwards compatibility.  I propose not
making things strictly backwards compatible, instead making things
work how novice users probably expect, and forcing expert users to
possibly do some work.  A server would only use nnmail-spool-file if
all of these apply for that server:

* The server is the first mail server in the list of
	(cons native-server secondary-servers)
* nnmail-get-new-mail is t
* nnmail-spool-file is well-defined
* nnmail-spool-methods is not defined

Then nnmail-get-new-mail would still default to t; people actually
using nnmail-spool-methods would normally set it to nil.

These restrictions would help people not shoot themselves in the foot
when they play around and add a second mail server.  (Hmm.
Non-native/secondary (editable) servers could notice if
nnmail-spool-methods is not defined, and ask whether it should be set
to nil or (default), to help out folks who create their first mail
server from the server buffer and want it to get new mail.  Did that
make sense?)

--Paul