Benjamin Berg authored Apr 20, 2019 and Benjamin Berg committed Aug 05, 2019

The existing units were never used as the corresponding support was
never merged into gnome-session.

This commits updates units to be usable with the newer gnome-session
unit definitions. Also added is appropriate failure/restart logic
including the ability to disable extensions. Note that extensions will
only be disabled if a failure happens in the first two minutes after
login.

GNOME/gnome-session!13
GNOME/gnome-shell!507