SPAWN_REQUIRE_SYSTEMD_SCOPE

Use this as a spawn flag (together with flags from #GSpawnFlags) in vte.pty.Pty.spawnAsync.

Requires vte.pty.Pty.spawnAsync etc. to move the newly created child process to a systemd user scope; if that fails, the whole spawn fails.

This is supported on Linux only.

enum SPAWN_REQUIRE_SYSTEMD_SCOPE = 134217728;