Improve VersionUtil version checks

[JRoy]

Summary;

• Adds warning/recommendations for potentially dangerous server softwares
• Now classifies servers without nms packages/classes as UNSTABLE

[Octol1ttle]

Can you also add Fabric if that's possible?

[benwoo1110]

ehhh essentials cant even start on a Fabric server....?

[JRoy]

Can you also add Fabric if that's possible?

yeah sure

ehhh essentials cant even start on a Fabric server....?

it can with translation layers like Fukkit but still shouldn't be

[benwoo1110]

it can with translation layers like Fukkit but still shouldn't be

Ah I see, in that case if you want, you can also add Nukkit (bedrock server type) to the list. There is a plugin called Pokkit that supposing allows Bukkit based plugin to work, but as usual, these type of hybrid hacks shouldn't be used.

[pop4959]

The one thing I'm a bit concerned about with this PR is that the phrasing could unintentionally alienate users. I think it might be better to leave it at "Unsupported" for all to be less biased.

[JRoy]

The one thing I'm a bit concerned about with this PR is that the phrasing could unintentionally alienate users. I think it might be better to leave it at "Unsupported" for all to be less biased.

I would agree if these were opinions but they have literally corrupted userdata in the past and the point of these messages are to warn users who don't know any better than to just make a vague unsupported message.