> Solved bugreport:7228, where you couldn't set the server to accept no users at all.
* 0 (zero) is used now when you wan't 0 users online;
* -1 is used now for unlimited users.

git-svn-id: https://rathena.svn.sourceforge.net/svnroot/rathena/trunk@17111 54d463be-8e91-2dee-dedb-b68131a5f0ec