launch stabilise thread

closes #44

although stabilise functionality is still untested

src/Hash2Pub/FediChord.hs

@@ -307,9 +307,10 @@ fediMainThreads sock nsSTM = do
     -- all get cancelled
     concurrently_
         (fediMessageHandler sendQ recvQ nsSTM) $
-        concurrently
-            (sendThread sock sendQ)
-            (recvThread sock recvQ)
+        concurrently_ (stabiliseThread nsSTM) $
+            concurrently_
+                (sendThread sock sendQ)
+                (recvThread sock recvQ)
 
 
 -- defining this here as, for now, the RequestMap is only used by fediMessageHandler.