Michał Kępień authored Jan 31, 2019 and Evan Hunt committed Jan 31, 2019

The 'nmsg' field of the xfrout_ctx_t structure is an integer, even
though it is only ever compared against 0 (for tracking whether the
QUESTION section has already been sent to the client).  Use a boolean
instead as it is more appropriate and also enables 'nmsg' to be
repurposed.