Feature request : support SIGTERM signal

[Nikoos]

Hello,

I set-up vmware_exporter with a systemd unit file. I had to schedule automatic restart every week with some timer systemd, and, I found that when issueing a SIGTERM to vmware_exporter (with my ExecStop command), is not managed nor supported via vmware_exporter.

It causes, due to Timeout, a SIGKILL signal to be sent to vmware_exporter PID, and the process is killed (which is the correct behavior), however, managing SIGTERM signal would allow vmware_exporter to be nicely stopped.

I do not know very well python but will try to test some code.

Best regards,

Nikos