Java Edition Classic server 1.8.3

1.9 (originally named 1.8.3) is a Classic server version that released with 0.28 on October 27, 2009."The skinny on the creative mode update" – The Word of Notch, October 27, 2009
The README file for this version labels it as "1.8.3", but the README for 1.9.1 changes this label to "1.9", implying that this version was originally labeled "1.8.3" and retroactively renamed to 1.9.
== Additions ==
* Added server support for all features added in 0.28.
* Added support for survival multiplayer.
** This is still a work in progress, and was not publicly available on the website.
** Was very buggy at this time.
== Fixes ==
* Fixed exploit where someone logging in with an illegal name would cause players to disconnect.
== References ==
es:Java Edition Classic server 1.8.3
pt:Edição Java Classic server 1.9
ru:Classic сервер 1.9
zh:Java版Classic服务器1.9