Backported 2.0.0 to legacy (1.8-1.12). Since I started running my own server, I understand why people don't use 1.13 and especially 1.14 yet. Mojang, make your game stable again!
Fix inventory being cleared after adding items in the hotbar, instead of before (when clear-inv was turned on)
Added support for player specific placeholders. SSX-Connector doesn't support it yet, but it will soon. When it will, you won't need to update ServerSelectorX.
A bunch of permission related fixes
Update to latest version of jetty (internal webserver)