Java Edition Classic server 1.3

1.3 was a Classic server version released with 0.0.17a on June 10, 2009.

Changes

 * Fix spawn location to default at log in
 * Name security
 * Server-side client verification
 * Add logged-in.txt on the server
 * added /setspawn command for admins
 * Fix heartbeat pausing the game
 * Don't let people spam ping requests
 * Fix ban ip (it was working, but not intuitive)
 * Various server fill exploit preventions. No more lava floods.
 * Show chatlog when chatting
 * Private server addresses changed behavior, sorry
 * Fix not starting on macintosh
 * Show logged in players on tab
 * No level generation or loading in MP mode