+TASK: ajouter un-e administrateurice $user
+ @remote % cp .../id_rsa var/pub/ssh/$user.key
+ @remote % gpg --armor --export --export-options export-clean >var/pub/openpgp/$user.key
+ @remote % git add var/pub/{openpgp,ssh}/$user.key
+ @remote % git commit -a -m "Ajout : admin : $user ."
+ @remote % ./vm_remote git_push
+ @hosted % vm_hosted git_reset
+ @hosted % vm_hosted user_admin_add $user