getmail's 'use_xoauth2' for outlook.office365.com

Hi!

There have been some indications/messages already, but I too wanted to
note that getmail's 'use_xoauth2',
<https://pyropus.ca./software/getmail/configuration.html#retriever-paramete=
rs>,
also does work for outlook.office365.com, with 'password_command'
pointing to a helper program that spits out the desired "token".

As I had already found such a helper program, provided by a co-worker for
use with OfflineIMAP, msmtp, I gave that one a try, and it works fine.
That is, I'm not using Stefan Krah's 'getmail-gmail-xoauth-tokens' helper
program, <https://www.bytereef.org/howto/oauth2/getmail.html>, but
instead using another such helper program, that conveniently happens to
implement the same program interface.  (Maybe not quite surprising, given
what those do -- simplicity wins, I guess!)  :-)

The documentation currently states:

> This is currently only supported with Gmail; if anyone extends this to su=
pport other IMAP providers, please let me know so I can include such suppor=
t in getmail.

So maybe generalize that; is generally expected to work?  And, note the
'getmail-gmail-xoauth-tokens' helper program as "for example"?  (This is
not meant to "demote" Stefan's original work, of course!)


Gr=C3=BC=C3=9Fe
 Thomas