mu4e reuses the default gnus-blocked-images, but sadly in the mu4e
context, the default (a function called gnus-block-private-groups) does
_not_ work (i.e., it never blocks).
Advise this function so it'll block for mu4e as well, and update the
docs.
Fixes: #2072.
I originally sent some code to the mailing list in 2012 to use dired
for marking attachments.
https://groups.google.com/g/mu-discuss/c/OPwdNZbB5GE/m/hnjNlNoLIu8J
As the function in gnus.el has since been fixed, the version of
gnus-dired-mail-buffers now works fine with mu4e (and has done for
many years). I suggest deleting the old code to make the
documentation simpler assuming that people are no longer on Emacs from
9 years ago.
In the "old" view, we had `mu4e-view-mime-part-actions`, which describes
various actions on attachments; in the brave new gnus-based view, those
do not work, but we have added something better:
mu4e-view-mime-part-actions
This needs some more documentation, but is useful already.
Make mu4e-view-use-gnus obsolete (it's the default now), and add a
variable mu4e-view-use-old (which must be set before starting mu4e).
Update documentation / mentions.
Load the correct view when starting mu4e, so people can customize
e.g. the keymap.
Add some sanity checking.
let is better than setq, as it doesn't permanently alter the value of
org-overriding-default-time. The setq has knock-on impacts in future
captures that use the value of this variable, if it is set.
Make mu4e-personal-address-p safe for being called with nil.
Upgrade code that used mu4e-user-mail-address-p to
mu4e-personal-address-p.
Update docs.
Add some more helpers to mu4e-message, and avoid some byte-compiler
warnings.
The code still has some problems, and the original author has moved
elsewhere (which is fine of course), but it's not ready enough for
1.4.... yet. So let's remove it for now and check again with 1.5+.
