He meant this C:\Windows\System32\drivers\etc\hosts file. After you add this line into hosts and able to login. Create a System Property in Openfire Admin Console:
rss.enabled
with a value false
I have done this the first day RSS links were added into Admin Console and honestly, i think Admin Console is not the place for this abomination. And now it cause people problems with logins? This is mad. Remove them and gone with the problems..