Use composer to install this extension. First make sure to initialize composer with the right settings:
composer -n init
composer install --no-dev
Next, modify your local composer.json file:
{
"repositories": [
{"type": "composer", "url": "http://satis.yireo.com"}
],
"require": {
"yireo/plg-system-sslredirect": "dev-master"
}
}
Note that the Yireo extension for Joomla is not listed on Packagist, but we use our own Satis server instead.
To install:
composer update --no-dev
Done.