Fix OpenSSL 3 breaks PKCS12 tmp file generation

[satmandu]

Fixes #53

• Add check for OpenSSL 3.x, and have OpenSSL use the -legacy flag when generating the PKCS12 temp file if OpenSSL 3.x is being used.

[videoman]

My cronjob screwed up my install of the UniFi Controller cause of this. Would be good to comment this to the main branch.

[gctwnl]

Is this software still maintained? If people download the script they get the 2017 version without the fix. I was looking into using this script (adapting it) so it can be used when the UC is run inside a docker container. Probably best is so it can update the cert inside a running container (probably requires an additional script)

[satmandu]

I have been unable to contact the maintainer to get this merged. :/

[satmandu]

Maybe someone can try to reach out to him here, or just fork the repo....

[gctwnl]

That link is dead (no LinkedIn page there) so we might consider all of this dead.

I'm using this as inspiration to build my own that works with a docker container I am using.

[satmandu]

LinkedIn link fixed!

[gctwnl]

I'm going to build my own solution based on his, but running inside the container. Maybe publish that later.

[satmandu]

Please note your solution here!

[gctwnl]

jacobalberty/unifi-docker#609