Say in the usage that overlay take is refused

Claude-Session: https://claude.ai/code/session_01NcbgfJ9Gum47zkFKWRaovL

cmd/mesh-host/main.go

@@ -110,8 +110,7 @@ reach, run as root at the machine.
   key         make this machine's tunnel key, or read the one it made, and print the public
               half: what its join token is issued for (novox/hq ADR 0169)
   enrol --token T  join the mesh — through the tunnel when the token was issued for a key
-  overlay take  take over the tunnel found here (novox/hq ADR 0105): its key becomes this
-              node's overlay key and the mesh is told, signed; --tunnel <iface> when several are up
+  overlay take  refused: the controller that took a rekey ended and no seat takes one now
   owned       what this host has applied and still owns
   hand-over <dir>  hand a directory used as found to the mesh: the next apply gives it its declared
               owner and mode. The operator's line is nox node hand-over <node> <dir> on the