Java Edition Classic server 1.3

1.3 is a server version of Java Edition Classic released with client version 0.0.17a on June 10, 2009.

Additions

 * Added server support for the admin command.
 * Pressing now shows all players logged in to the server.
 * Chat now shows the full log of recent messages.
 * Name security.
 * Server-side client verification.
 * Add logged-in.txt server file.

Changes

 * Made work more intuitively.
 * Changed the behavior of private server addresses.
 * No level generation or loading in MP mode.

Fixes

 * Fixed the server heartbeat check pausing the game.
 * Fixed players' spawn location changing to default when they log in.
 * Fixed the game not starting on Mac OS computers.
 * Clients can no longer spam ping requests.
 * Various server fill exploit preventions; players can no longer create lava floods.