Add libxml2-utils, needed to compile erlang
Use erlang official deb package, rather than build from source
Install mod_admin_extra
Remove invalid action from the erlang dpkg install
Add TODO reminder to remove unnecessary items from the list of packages to install from apt
Only download erlang .deb file if it's not there
Create the ejabberd group and user
Add an example PEM
Remove commented code
Include example PEM file (forgot)
Align big hash by its rockets