Windows doesn't have SysProcAttr

cmd/syncthing/openurl_unix.go

@@ -0,0 +1,23 @@
+// +build !windows
+
+package main
+
+import (
+	"os/exec"
+	"runtime"
+	"syscall"
+)
+
+func openURL(url string) error {
+	switch runtime.GOOS {
+	case "darwin":
+		return exec.Command("open", url).Run()
+
+	default:
+		cmd := exec.Command("xdg-open", url)
+		cmd.SysProcAttr = &syscall.SysProcAttr{
+			Setpgid: true,
+		}
+		return cmd.Run()
+	}
+}