[move only] Collect all private members of PeerLogicValidation together

We don't have a project style for ordering class members, but it always
makes sense to have no more than one of each public/protected/private
specifier.

Also move documentation for MaybeDiscourageAndDisconnect to the header.

src/net_processing.cpp

@@ -3795,11 +3795,6 @@ void PeerLogicValidation::ProcessMessage(CNode& pfrom, const std::string& msg_ty
     return;
 }
 
-/** Maybe disconnect a peer and discourage future connections from its address.
- *
- * @param[in]   pnode     The node to check.
- * @return                True if the peer was marked for disconnection in this function
- */
 bool PeerLogicValidation::MaybeDiscourageAndDisconnect(CNode& pnode)
 {
     const NodeId peer_id{pnode.GetId()};

src/net_processing.h

@@ -28,15 +28,6 @@ static const bool DEFAULT_PEERBLOCKFILTERS = false;
 static const int DISCOURAGEMENT_THRESHOLD{100};
 
 class PeerLogicValidation final : public CValidationInterface, public NetEventsInterface {
-private:
-    CConnman& m_connman;
-    /** Pointer to this node's banman. May be nullptr - check existence before dereferencing. */
-    BanMan* const m_banman;
-    ChainstateManager& m_chainman;
-    CTxMemPool& m_mempool;
-
-    bool MaybeDiscourageAndDisconnect(CNode& pnode);
-
 public:
     PeerLogicValidation(CConnman& connman, BanMan* banman, CScheduler& scheduler, ChainstateManager& chainman, CTxMemPool& pool);
 
@@ -92,8 +83,20 @@ class PeerLogicValidation final : public CValidationInterface, public NetEventsI
                         const std::atomic<bool>& interruptMsgProc);
 
 private:
-    int64_t m_stale_tip_check_time; //!< Next time to check for stale tip
+    /** Maybe disconnect a peer and discourage future connections from its address.
+     *
+     * @param[in]   pnode     The node to check.
+     * @return                True if the peer was marked for disconnection in this function
+     */
+    bool MaybeDiscourageAndDisconnect(CNode& pnode);
 
+    CConnman& m_connman;
+    /** Pointer to this node's banman. May be nullptr - check existence before dereferencing. */
+    BanMan* const m_banman;
+    ChainstateManager& m_chainman;
+    CTxMemPool& m_mempool;
+
+    int64_t m_stale_tip_check_time; //!< Next time to check for stale tip
 };
 
 struct CNodeStateStats {