emacs recommends mailutils which is in universe

[Jeremy Bícha]

emacs now recommends mailutils but mailutils is in universe. mailutils would pull in gsasl, kyotocabinet and libntlm.

To quote form the 0.26 NEWS:
"** The new option 'configure --with-mailutils' causes Emacs to rely on
GNU Mailutils to retrieve email. It is recommended, and is the
default if GNU Mailutils is installed. When '--with-mailutils' is not
in effect, the Emacs build procedure by default continues to build and
install a limited 'movemail' substitute that retrieves POP3 email only
via insecure channels. To avoid this problem, use either
'--with-mailutils' or '--without-pop' when configuring; '--without-pop'
is the default on platforms other than native MS-Windows."
https://github.com/emacs-mirror/emacs/blob/master/etc/NEWS.26#L197-L204

So people that use emacs for email will want to have mailutils installed.

I don't use email and don't know how common it is to use emacs for email.

I think we'll want to demote mailutils to Suggests in Ubuntu.