Transfer statistics are currently only reported for incoming transfers,
even though they are equally useful for outgoing transfers. Define a
separate structure for keeping track of the number of messages, records,
and bytes sent during each outgoing transfer, along with the time each
outgoing transfer took. Repurpose the 'nmsg' field of the xfrout_ctx_t
structure for tracking the number of messages actually sent, ensuring it
is only increased after isc_socket_send() indicates success. Report the
statistics gathered when an outgoing transfer completes.
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.
Rather than overloading dns_zone_slave and discerning between a slave
zone and a mirror zone using a zone option, define a separate enum
value, dns_zone_mirror, to be used exclusively by mirror zones. Update
code handling slave zones to ensure it also handles mirror zones where
applicable.
4708. [cleanup] Legacy Windows builds (i.e. for XP and earlier)
are no longer supported. [RT #45186]
4707. [func] The lightweight resolver daemon and library (lwresd
and liblwres) have been removed. [RT #45186]
4706. [func] Code implementing name server query processing has
been moved from bin/named to a new library "libns".
Functions remaining in bin/named are now prefixed
with "named_" rather than "ns_". This will make it
easier to write unit tests for name server code, or
link name server functionality into new tools.
[RT #45186]
