Bug fixes and added features

[ApliNi]

• Add prevent-nesting functionality

  If you are already riding, you can no longer tether other players, This does not affect leash mobs

• fix: Entities are not being cleared properly when multiple players use a lead

  Entities mounted by the first player will not be cleared if the second player leashes the player

These codes were tested on my server and worked fine :)

[NaspoDev]

Wow thank you so much ApliNi! Appreciate the help, great code :)