This commit adds `a shutdown_ splash` options to the to the existing kernel configuration and tostartup splash(4)
loader.conf to let the user enable andscreen feature. It can be customize a splash screend by providing a PNG image that willo the
be displayed at shutdown time.
Signed-off-by: Quentin Thébault <quentin.thebault@d_splash directive loader.conf(5).
Sponsored by: Defenso.fr>
Sponsored by: Defenso
MFC after: 2 weeks