Fix i18n FR and add some sudo to restore script

scripts/restore

@@ -2,8 +2,8 @@
 
 backup_dir="${1}/apps/vpnclient"
 
-mkdir -p /etc/openvpn/
-cp -a "${backup_dir}/keys/" /etc/openvpn/
+sudo mkdir -p /etc/openvpn/
+sudo cp -a "${backup_dir}/keys/" /etc/openvpn/
 
 gitcommit=$(sudo grep revision /etc/yunohost/apps/vpnclient/status.json | sed 's/.*"revision": "\([^"]\+\)".*/\1/')
 tmpdir=$(mktemp -dp /tmp/ vpnclient-restore-XXXXX)