windows: add CTRL_CLOSE_EVENT, CTRL_LOGOFF_EVENT, and CTRL_SHUTDOWN_EVENT
This is part of the changes necessary to allow simulated `SIGTERM` on Windows (these are the relevant events for `SetConsoleCtrlHandler` that would correspond to `SIGTERM` on Unix).
See https://docs.microsoft.com/en-us/windows/console/handlerroutine for a good documentation source upstream to confirm these values.
Updates golang/go#7479
(This exists under `src/cmd/vendor/golang.org/x/sys/windows/types_windows.go` in https://github.com/golang/go, so I figured I would start here and follow up with a https://github.com/golang/go PR/CL if reviewers here were amenable to this half.)
Change-Id: If3d0175bb889e4eddca838ef765faf5e379285ea
GitHub-Last-Rev: 7db84d6cd3d592afc73585053618af1f2fd000de
GitHub-Pull-Request: golang/sys#37
Reviewed-on: https://go-review.googlesource.com/c/sys/+/187578
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
Run-TryBot: Alex Brainman <alex.brainman@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Tianon Gravi