[4234] Made UnixCommandSocket::receiveHandler visible to doxygen

src/lib/config/command_socket_factory.cc

@@ -134,6 +134,8 @@ private:
         return (fd);
     }
 
+    /// @public
+
     /// @brief Connection acceptor, a callback used to accept incoming connections.
     ///
     /// This callback is used on a control socket. Once called, it will accept
@@ -180,6 +182,8 @@ private:
             .arg(sockfd_);
     }
 
+    /// @private
+
     // This method is called when we shutdown the connection.
     void close() {
         LOG_INFO(command_logger, COMMAND_SOCKET_UNIX_CLOSE).arg(sockfd_)