refactor: Use Mutex type for some mutexes in CNode class

Author: hebasto

src/net.h

@@ -815,9 +815,9 @@ class CNode
     size_t nSendOffset{0}; // offset inside the first vSendMsg already sent
     uint64_t nSendBytes GUARDED_BY(cs_vSend){0};
     std::deque<std::vector<unsigned char>> vSendMsg GUARDED_BY(cs_vSend);
-    RecursiveMutex cs_vSend;
-    RecursiveMutex cs_hSocket;
-    RecursiveMutex cs_vRecv;
+    Mutex cs_vSend;
+    Mutex cs_hSocket;
+    Mutex cs_vRecv;
 
     RecursiveMutex cs_vProcessMsg;
     std::list<CNetMessage> vProcessMsg GUARDED_BY(cs_vProcessMsg);