fix typo src/net.cpp

src/net.cpp

@@ -813,7 +813,7 @@ void ThreadSocketHandler2(void* parg)
             }
             else if (CNode::IsBanned(addr))
             {
-                printf("connetion from %s dropped (banned)\n", addr.ToString().c_str());
+                printf("connection from %s dropped (banned)\n", addr.ToString().c_str());
                 closesocket(hSocket);
             }
             else