Proper signal handling in monitor process

integration/common_test.go

@@ -19,6 +19,7 @@ import (
 	"os"
 	"os/exec"
 	"path/filepath"
+	"runtime"
 	"time"
 )
 
@@ -54,7 +55,11 @@ func (p *syncthingProcess) start() error {
 }
 
 func (p *syncthingProcess) stop() {
-	p.cmd.Process.Kill()
+	if runtime.GOOS != "windows" {
+		p.cmd.Process.Signal(os.Interrupt)
+	} else {
+		p.cmd.Process.Kill()
+	}
 	p.cmd.Wait()
 }