News that pops up in a formspec when a player joins the server
Create a text file called news.txt in the world folder.
This text file can be updated any time and will always be current in game without a server reboot
To add extra articles just create a text file for each article in the world folder in the format
news_[article name].txt
(i.e. news_crafting.txt would show an article for the command /news crafting)