[net] Construct addrman outside connman

node.context owns the CAddrMan. CConnman holds a reference to
the CAddrMan.

src/node/context.h

@@ -12,6 +12,7 @@
 
 class ArgsManager;
 class BanMan;
+class CAddrMan;
 class CBlockPolicyEstimator;
 class CConnman;
 class CScheduler;
@@ -35,6 +36,7 @@ class WalletClient;
 //! any member functions. It should just be a collection of references that can
 //! be used without pulling in unwanted dependencies or functionality.
 struct NodeContext {
+    std::unique_ptr<CAddrMan> addrman;
     std::unique_ptr<CConnman> connman;
     std::unique_ptr<CTxMemPool> mempool;
     std::unique_ptr<CBlockPolicyEstimator> fee_estimator;