Upgrade to 0.2.2

What this upgrade does:
- renew the certificate
- add a daily cron job that will check if the certificate must be
  renewed

The `renew_from_cube` script only renew the cert if it will [expire in
less than 4
months](https://github.com/Neutrinet/renew_cert/blob/master/renew_from_cube.py#L29).

scripts/upgrade

@@ -15,12 +15,24 @@ fi
 
 # 0.2 -> 0.2.1
 if [[ "$version" == "0.2" ]]; then
-
-    get_out_of_testing
-
     sudo yunohost app setting neutrinet version -v "0.2.1"
     version="0.2.1"
 
-    cd /opt/neutrinet/renew_cert
+    cd $RENEW_CERT_PATH
+    sudo ve/bin/python renew_from_cube.py
+fi
+
+# 0.2.1 -> 0.2.2
+if [[ "$version" == "0.2.1" ]]; then
+    sudo yunohost app setting neutrinet version -v "0.2.2"
+    version="0.2.2"
+
+    cd $RENEW_CERT_PATH
     sudo ve/bin/python renew_from_cube.py
+
+    cat <<EOF > /etc/cron.daily/neutrinet-renew-cert.sh
+#!/bin/bash
+cd $RENEW_CERT_PATH && ve/bin/python renew_from_cube.py
+EOF
+    chmod 0755 /etc/cron.daily/neutrinet-renew-cert.sh
 fi