scripts: join pid namespace in systemd-autofs-restart.sh

Without correct pid namespace systemctl is not able to determine whether
autofs is active or not.
The reason is unaccessible proc due to mount namespace change without pid
namespace change.
Signed-off-by: Stanislav Kinsburskiy <skinsbursky@virtuozzo.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

scripts/systemd-autofs-restart.sh

@@ -34,7 +34,7 @@ if [ ! -x $NS_ENTER ]; then
 	exit 2
 fi
 
-JOIN_CT="$NS_ENTER -t $CRTOOLS_INIT_PID -m -u"
+JOIN_CT="$NS_ENTER -t $CRTOOLS_INIT_PID -m -u -p"
 
 # Skip container, if it's not systemd based
 [ $($JOIN_CT basename -- $(readlink /proc/1/exe)) == "systemd" ] || exit 0