Replace links to Redmine on ring.cx with links to Tuleap and clearly mark the wiki as deprecated
Issue generated from Tuleap's migration script. Originally submitted by: Ciro Santilli (cirosantilli)
https://ring.cx/en/documentation/how-to-contribute-to-the-ring-project contains a few links to the Redmine:
IIUC, the Redmine wiki and issues have been deprecated in favour of Tuleap.
Also say that very clearly at https://projects.savoirfairelinux.com/projects/ring/wiki/WikiStart that Redmine is deprecated.