Bukkit

Internals:

• Fixed concurrency error from removing held IPs

User End:

• Fixed error in console
• Fixed command using wrong permission node for a different plugin

Dev End(API):

• getHeldAddresses() now returns a Map instead of a HashMap
• playerUsedMPlist(Player) is deprecated, will be removed when support for Trident or Sponge is out. playerUsedMPlist(UUID) will remain just fine.