Mark Andrews authored Feb 26, 2019 and Evan Hunt committed Mar 07, 2019

(cherry picked from commit 435ae2f2)

4445.	[cleanup]	isc_errno_toresult() can now be used to call the
			formerly private function isc__errno2result().
			[RT #43050]

4444.	[bug]		Fixed some issues related to dyndb: A bug caused
			braces to be omitted when passing configuration text
			from named.conf to a dyndb driver, and there was a
			use-after-free in the sample dyndb driver. [RT #43050]

Patch for dyndb driver submitted by Petr Spacek at Red Hat.

3598.	[cleanup]	Improved portability of map file code. [RT #33820]

2436.   [security]      win32: UDP client handler can be shutdown. [RT #18576]

2434.   [bug]           Fixed a minor error-reporting bug in
                        lib/isc/win32/socket.c.

2432.   [bug]           More Windows socket handling improvements.  Stop
                        using I/O events and use IO Completion Ports
                        throughout.  Rewrite the receive path logic to make
                        it easier to support multiple simultaneous
                        requestrs in the future.  Add stricter consistency
                        checking as a compile-time option (define
                        ISC_SOCKET_CONSISTENCY_CHECKS; defaults to off).

2420.   [bug]           Windows socket handling cleanup.  Let the io
                        completion event send out cancelled read/write
                        done events, which keeps us from writing to memeory
                        we no longer have ownership of.  Add debugging
                        socket_log() function.  Rework TCP socket handling
                        to not leak sockets.

                        [RT #13753]

1881.   [port]          win32: Handle ERROR_NETNAME_DELETED.  [RT #13753]

                       isc_result_t. [RT #2404]

Added support for isc__strerror, moving the message code handling from errno2result.c to strerror.c. updated routines to use it and updated makes to include additional files