Update from upstream SpigotMC

Upstream merge (we must go deeper) SpigotMC/Spigot@1e7bc383c3

Spigot-Server-Patches/Teleport-passenger-vehicle-with-player.patch

@@ -47,18 +47,8 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 --- a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
 +++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
 @@ -0,0 +0,0 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
-         if (event.isCancelled()) {
-             return false;
-         }
--        
-+
-+        // PaperSpigot start
-         // Spigot Start
--        eject();
--        leaveVehicle();
-+        //eject();
-+        //leaveVehicle();
-         // Spigot End
+         // If this player is riding another entity, we must dismount before teleporting.
+         entity.mount(null);
  
 +        // PaperSpigot start
 +        Entity vehicle = entity.vehicle;