[refactor] Remove netaddress.h from kernel headers

Move functions requiring the netaddress.h include out of
libbitcoinkernel source files.

The netaddress.h file contains many non-consensus related definitions
and should thus not be part of the libbitcoinkernel. This commit makes
netaddress.h no longer a required include for users of the
libbitcoinkernel.

This commit is part of the libbitcoinkernel project, namely its stage 1
step 3: Decouple most non-consensus headers from libbitcoinkernel.

src/kernel/chainparams.h

@@ -8,7 +8,6 @@
 
 #include <consensus/params.h>
 #include <kernel/messagestartchars.h>
-#include <netaddress.h>
 #include <primitives/block.h>
 #include <uint256.h>
 #include <util/chaintype.h>
@@ -89,15 +88,6 @@ public:
     const Consensus::Params& GetConsensus() const { return consensus; }
     const MessageStartChars& MessageStart() const { return pchMessageStart; }
     uint16_t GetDefaultPort() const { return nDefaultPort; }
-    uint16_t GetDefaultPort(Network net) const
-    {
-        return net == NET_I2P ? I2P_SAM31_PORT : GetDefaultPort();
-    }
-    uint16_t GetDefaultPort(const std::string& addr) const
-    {
-        CNetAddr a;
-        return a.SetSpecial(addr) ? GetDefaultPort(a.GetNetwork()) : GetDefaultPort();
-    }
 
     const CBlock& GenesisBlock() const { return genesis; }
     /** Default value for -checkmempool and -checkblockindex argument */

src/net.cpp

@@ -470,7 +470,7 @@ CNode* CConnman::ConnectNode(CAddress addrConnect, const char *pszDest, bool fCo
         Ticks<HoursDouble>(pszDest ? 0h : Now<NodeSeconds>() - addrConnect.nTime));
 
     // Resolve
-    const uint16_t default_port{pszDest != nullptr ? m_params.GetDefaultPort(pszDest) :
+    const uint16_t default_port{pszDest != nullptr ? GetDefaultPort(pszDest) :
                                                      m_params.GetDefaultPort()};
     if (pszDest) {
         const std::vector<CService> resolved{Lookup(pszDest, default_port, fNameLookup && !HaveNameProxy(), 256)};
@@ -2769,7 +2769,7 @@ std::vector<AddedNodeInfo> CConnman::GetAddedNodeInfo() const
     }
 
     for (const std::string& strAddNode : lAddresses) {
-        CService service(LookupNumeric(strAddNode, m_params.GetDefaultPort(strAddNode)));
+        CService service(LookupNumeric(strAddNode, GetDefaultPort(strAddNode)));
         AddedNodeInfo addedNode{strAddNode, CService(), false, false};
         if (service.IsValid()) {
             // strAddNode is an IP:port
@@ -3094,6 +3094,16 @@ NodeId CConnman::GetNewNodeId()
     return nLastNodeId.fetch_add(1, std::memory_order_relaxed);
 }
 
+uint16_t CConnman::GetDefaultPort(Network net) const
+{
+    return net == NET_I2P ? I2P_SAM31_PORT : m_params.GetDefaultPort();
+}
+
+uint16_t CConnman::GetDefaultPort(const std::string& addr) const
+{
+    CNetAddr a;
+    return a.SetSpecial(addr) ? GetDefaultPort(a.GetNetwork()) : m_params.GetDefaultPort();
+}
 
 bool CConnman::Bind(const CService& addr_, unsigned int flags, NetPermissionFlags permissions)
 {

src/net.h

@@ -1358,6 +1358,9 @@ private:
     // Whether the node should be passed out in ForEach* callbacks
     static bool NodeFullyConnected(const CNode* pnode);
 
+    uint16_t GetDefaultPort(Network net) const;
+    uint16_t GetDefaultPort(const std::string& addr) const;
+
     // Network usage totals
     mutable Mutex m_total_bytes_sent_mutex;
     std::atomic<uint64_t> nTotalBytesRecv{0};