Update docs for 2.3 upgrade
Update docs for 2.3 upgrade

ThiefMaster/indico,indico/indico,ThiefMaster/indico,ThiefMaster/indico,indico/indico,DirkHoffmann/indico,pferreir/indico,indico/indico,pferreir/indico,pferreir/indico,DirkHoffmann/indico,indico/indico,DirkHoffmann/indico,ThiefMaster/indico,pferreir/indico,DirkHoffmann/indico