Handle self-signed certificates better

[jpcaruana]

howfast tells me Monitor is DOWN for certificate signed by unknown authority reason.

It would be great to mark it as UP (or warn) but not down. The site is in fact UP with a known issue on certificate or to be able to ack the issue ("I know I have a certificate signed by unknown authority") and keep on monitoring the server

[MickaelBergem]

Hello JP, thanks for reporting this issue! The monitor is indeed not down, a "warn" state is a good idea.

For self-signed certificates, another idea could be to add a "Do not check the certificate" checkbox in the monitor's properties.