Proper handling of Windows service management

[bpetit]

Problem

Scpahandre only runs on windows as a bare executable. To use it as a daemon it needs to integrate with windows service management (sc.exe).

Solution

Integrate windows service events management in scaphandre, when compiled for and used on windows.

This crate may help : https://docs.rs/windows-service/latest/windows_service/

[bpetit]

Start works fine.

• graceful stop
• graceful restart