To use this script you should copy the examples in
%%PREFIX%%/etc/%%PORTNAME%%/ and at least add a
domain and a contact mail address.

You should also copy the openssl.cnf.sample file in
%%PREFIX%%/openssl so you won't get warnings about
it missing.

In order to run the script regularly to update
the certificates add this line to /etc/periodic.conf

weekly_letsencrypt_enable="YES"

Additionally the following parameters can be added to
/etc/periodic.conf

To run the certification renenewal as a different user
weekly_letsencrypt_user="_letsencrypt"
To run a script after the renewal (as root)
weekly_letsencrypt_deployscript="%%PREFIX%%/etc/%%PORTNAME%%/deploy.sh"