slide: don't accept new slides when leaving the ring
slide: don't accept new slides when leaving the ring

There is a short period of time when a node has finished its leaving slide and has told the rm to leave but has not left yet. Don't accept new slide operations then!
digshock/scalaris,digshock/scalaris,digshock/scalaris,seyyed/scalaris,digshock/scalaris,tectronics/scalaris,tectronics/scalaris,digshock/scalaris,seyyed/scalaris,seyyed/scalaris,digshock/scalaris,tectronics/scalaris,seyyed/scalaris,tectronics/scalaris,seyyed/scalaris,tectronics/scalaris,seyyed/scalaris,tectronics/scalaris,seyyed/scalaris,tectronics/scalaris,digshock/scalaris