every comment about X11 and session management in general claims it was
broken, not going to claim otherwise. everything that does not use
KApplication shall not be involved into session management now and gets
the middle finger (SIGTERM or SIGKILL) after 5 sec by klauncher when the
session is done
also session management has to be explicitly enabled by applications
now, disabled by default
Signed-off-by: Ivailo Monev <xakepa10@gmail.com>