[gnome-session] (16 commits) Non-fast-forward update to branch wip/benzea/systemd-user-switch

[Benjamin Berg <bberg src gnome org>]

The branch 'wip/benzea/systemd-user-switch' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  f8d80f9... autostart-app: Add X-GNOME-Autostart-systemd for hiding
  c105900... fail-whale: Never show logout button in GDM
  c2a2402... meson: Add compile time option to control systemd session m
  34e8055... manager: Integrate with systemd startup notification
  c9bc618... util: Add API to start a systemd unit
  c98b1c4... manager: Add systemd-managed property
  991d159... manager: Allow fetching the configured session without mana
  ed3940c... manager: Add initilization synchronization point DBus API
  9ec77dc... main: Add systemd gnome-session monitoring code for leader
  35a4725... gnome-session-ctl: Add helper binary for systemd targets
  912e147... data: Add systemd user units
  63561a0... manager: Quit session manager after completing shutdown
  79088b0... manager: Rely on systemd restarting DBus already
  fa296ae... main: Export autostart dir into environment
  c8166f6... main: Enable systemd usage
  c7d438d... shell-extensions: Touch login warning file when disabling e

Commits added to the branch:

  3b73720... autostart-app: Add X-GNOME-HiddenUnderSystemd for hiding
  90fd993... fail-whale: Never show logout button in GDM
  e8e9415... meson: Add compile time option to control systemd session m
  8a91b9e... manager: Integrate with systemd startup notification
  0e30c0f... util: Add API to start a systemd unit
  98becaf... manager: Add systemd-managed property
  d080265... manager: Allow fetching the configured session without mana
  9b692a3... manager: Add initilization synchronization point DBus API
  7ba953e... main: Add systemd gnome-session monitoring code for leader
  922aa72... gnome-session-ctl: Add helper binary for systemd targets
  0b4feda... data: Add systemd user units
  cf86229... manager: Quit session manager after completing shutdown
  7c7d16f... manager: Rely on systemd restarting DBus already
  e6a94c3... main: Export autostart dir into environment
  cd34294... main: Enable systemd usage
  7d3da69... shell-extensions: Touch login warning file when disabling e