swarm_manager: move toConnectCb_ in ioPool

Else, it can cause a deadlock with connManagerMtx_

Change-Id: Idd9bb994a6c3f088b2998140a17fd41786d961a3

src/jamidht/swarm/swarm_manager.cpp

@@ -55,15 +55,22 @@ SwarmManager::setKnownNodes(const std::vector<NodeId>& known_nodes)
             }
         }
     }
+
+    dht::ThreadPool::io().run([w=weak(), newNodes=std::move(newNodes)] {
+        auto shared = w.lock();
+        if (!shared)
+            return;
         // If we detect a new node which already got a TCP link
         // we can use it to speed-up the bootstrap (because opening
         // a new channel will be easy)
         std::set<NodeId> toConnect;
         for (const auto& nodeId: newNodes) {
-        if (toConnectCb_ && toConnectCb_(nodeId))
+            if (shared->toConnectCb_ && shared->toConnectCb_(nodeId))
                 toConnect.emplace(nodeId);
         }
-    maintainBuckets(toConnect);
+        shared->maintainBuckets(toConnect);
+    });
+
 }
 
 void