rt_frt: renew a routing table entry
rt_frt: renew a routing table entry

When an existing node is relearned, add it to the routing table if is newer than the
already existing node.
digshock/scalaris,seyyed/scalaris,tectronics/scalaris,tectronics/scalaris,seyyed/scalaris,digshock/scalaris,digshock/scalaris,seyyed/scalaris,tectronics/scalaris,tectronics/scalaris,tectronics/scalaris,seyyed/scalaris,digshock/scalaris,digshock/scalaris,digshock/scalaris,digshock/scalaris,seyyed/scalaris,seyyed/scalaris,seyyed/scalaris,tectronics/scalaris,tectronics/scalaris