feat: Add extra vHost data in ConnectionHandshakeEvent

[koneiii]

I've retrieved a feature from BungeeCord that allows you to retrieve additional data.

Some clients use this method to send data to the server.

Links (French) :
https://gist.github.com/nathan818fr/93516ab7a4968489938c25b097fd1af1
https://github.com/PactifyLauncherExamples/PactifyPlugin/blob/master/bungee/plugin/src/main/java/nz/pactifylauncher/plugin/bungee/HandshakeFix.java

[456dev]

i would instead suggest a public String getRawVirtualHost() method that returns the string given by clients as-is, rather than only the data following the null byte (seeing as you would need to parse it yourself anyway, and nothing guarantees the format.)

side note, if this if part of the vhost, i would have it as part of the InboundConnection interface, as you may want to access this data after the connection is successful, like the standard vhost

[koneiii]

i would instead suggest a public String getRawVirtualHost() method that returns the string given by clients as-is, rather than only the data following the null byte (seeing as you would need to parse it yourself anyway, and nothing guarantees the format.)

side note, if this if part of the vhost, i would have it as part of the InboundConnection interface, as you may want to access this data after the connection is successful, like the standard vhost

I only made it as a bungeecord, I don't plan to modify it currently, I added it for my use :)