The default install for icedove also installs packages
'calendar-google-overview' and 'iceowl-extension'. I don't remember such
in any other install of icedove or thunderbird.
Personally, I'm in the camp of opposing the integration of mail and
calendar, kind of out of the same sensibility that has me opposing systemd.
One can over-ride the default by using --no-install-recommends, but
devuan, should it choose to do so, can take a stand by including icedove
in the default install without the two packages.
::
[DNG] icedove install-recommends
