This hook will copy the key and certificate chain to the specified
mailcow installation (as described in
https://mailcow.github.io/mailcow-dockerized-docs/firststeps-ssl/#use-own-certificates)
and restarts the containers, that are using the certificates.
The hook has 2 parameters:
* `DEPLOY_MAILCOW_PATH`: The path to the mailcow installation (required)
* `DEPLOY_MAILCOW_RELOAD`: The reload command, defaults to `docker-compose restart postfix-mailcow dovecot-mailcow nginx-mailcow`
Eliminated php dependency with a private function for urlencode using sed. Php had failed on godaddy due to multiple php instances and naturally cron using the one without the necessary -r option. Compared to previous PR the sed code is now POSIX and should work on all environments.
HAProxy requires the certificate chain and key to be concatenated and placed somewhere (can be anywhere). This script expects a single environment variable with the path where the concatenated PEM file should be written