Give better feedback to the user how the Tor spheres can be stopped, because stem.util.system.get_pid_by_port() doesn't work reliably on all Linux distributions (tor#9793).
Give better feedback to the user how the Tor spheres can be stopped,
because stem.util.system.get_pid_by_port()
doesn't work reliably on all Linux distributions (tor#9793).

kaie/sphere-detection,kaie/sphere-detection,kaie/sphere-detection