Add Graceful shutdown for Windows and hooks for shutdown of goroutines (#8964)

* Graceful Shutdown for windows and others

Restructures modules/graceful, adding shutdown for windows, removing and
replacing the old minwinsvc code.

Creates a new waitGroup - terminate which allows for goroutines to
finish up after the shutdown of the servers.

Shutdown and terminate hooks are added for goroutines.

* Remove unused functions - these can be added in a different PR

* Add startup timeout functionality

* Document STARTUP_TIMEOUT

1 files changed, 0 insertions, 18 deletions

diff --git a/modules/minwinsvc/minwinsvc.go b/modules/minwinsvc/minwinsvc.go
deleted file mode 100644
index 4cd89ffdb4..0000000000
--- a/modules/minwinsvc/minwinsvc.go
+++ /dev/null
@@ -1,18 +0,0 @@
-// Copyright 2015 Daniel Theophanes.
-// Use of this source code is governed by a zlib-style
-// license that can be found in the LICENSE file.package service
-
-// Package minwinsvc is a minimal non-invasive windows only service stub.
-//
-// Import to allow running as a windows service.
-//   import _ "github.com/kardianos/minwinsvc"
-// This will detect if running as a windows service
-// and install required callbacks for windows.
-package minwinsvc
-
-// SetOnExit sets the function to be called when the windows service
-// requests an exit. If this is not called, or if it is called where
-// f == nil, then it defaults to calling "os.Exit(0)".
-func SetOnExit(f func()) {
-	setOnExit(f)
-}