[net_processing] Move SendBlockTransactions into PeerManager

src/net_processing.h

@@ -11,6 +11,7 @@
 #include <sync.h>
 #include <validationinterface.h>
 
+class BlockTransactionsRequest;
 class BlockValidationState;
 class CBlockHeader;
 class CChainParams;
@@ -118,6 +119,8 @@ private:
     /** Process a single headers message from a peer. */
     void ProcessHeadersMessage(CNode& pfrom, const std::vector<CBlockHeader>& headers, bool via_compact_block);
 
+    void SendBlockTransactions(CNode& pfrom, const CBlock& block, const BlockTransactionsRequest& req);
+
     const CChainParams& m_chainparams;
     CConnman& m_connman;
     /** Pointer to this node's banman. May be nullptr - check existence before dereferencing. */