Okay thank you.
(EDIT: I installed successfully using an external tutorial.
Just some feedback : the /installer is a very convenient way to finalize the configuration, but it could use an update regarding the tls:// rule which is absent. It may be self-evident for seasoned admins, but for me, the simple fact that tls:// wasn't mentionned made me hesitate. Finally found on a forum that I indeed had to specify it, my default conclusion being that the precision was needed for older SSL only
Also, but I'm not sure about this one because it may be too specific for my case, but the TLS auth wouldn't work because my certificate expected a connection to the host specified in it's CN, and not localhost. It may be worth it having this little hint below the default 'localhost' entries, as I've seen some forum posts about this since PHP5.6 who doesn't accept hostname/cert missmatches anymore).