@brief Handles an SSH new channel open session request
@param session current session handler
@param userdata Userdata to be passed to the callback function.
@returns a valid ssh_channel handle if the request is to be allowed
@returns NULL if the request should not be allowed
@warning The channel pointer returned by this callback must be closed by the application.
@brief Handles an SSH new channel open session request @param session current session handler @param userdata Userdata to be passed to the callback function. @returns a valid ssh_channel handle if the request is to be allowed @returns NULL if the request should not be allowed @warning The channel pointer returned by this callback must be closed by the application.