@wpn onboarding updates

I was running 2 separate apps for shell/XMPP account registration at @wpn, so far..

This night I made some changes to the original code (provided by Schimon) and I got just one app with account choice - meaning that you must choose what account type you want in the form. Shell accounts are for friends only, as it's always been.

As a consequence of that, I shut down the old address for XMPP account onboarding and left only the main one, which is:

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