Package lightdm-gir-devel: Information

- Fixed tty locking: enabled it only for wayland sessions.

- Reworked wayland session support to use "wayland-session-wrapper"
  and "wayland-guest-wrapper" settings.
- Implemented locking used tty to prevent systemd running getty
  when wayland session is starting on same tty.
- Added option "use-free-vt" allowing to force lightdm select first free tty
  instead of just next tty even if it's used. This option is disabled by default.

- Disabled using session-wrapper and guest-wrapper settings
  for wayland sessions (Closes: 40207).