Avoid setting up the Alias rule, which was a helper to let us 'disable' the
systemd service including dbus-activations. Without the Alias, 'disable' will
still let starting ModemManager through dbus-activation. If you really want to
fully disallow starting MM also through dbus-activation, you should 'mask' and
'unmask' the service.
E.g.:
$ sudo systemctl mask ModemManager
ln -s '/dev/null' '/etc/systemd/system/ModemManager.service'
$ sudo mmcli -L
error: couldn't find the ModemManager process in the bus
$ sudo systemctl unmask ModemManager
rm '/etc/systemd/system/ModemManager.service'
$ sudo mmcli -L
No modems were found
https://bugzilla.gnome.org/show_bug.cgi?id=701229
These diagrams are not expected to change much, so just include the generated
PNGs in the repository, and remove 'dia' from the prerequisites to build the
documentation.
It's pointless to have libmm-common around, just merge it into libmm-glib and
make ModemManager depend on libmm-glib directly. At the end, the non-common
stuff in libmm-glib is really minimal.
