[4.4] fix cli scheduler:run breaks if --live-site does not end with /

[svanschu]

Pull Request for Issue #42859 .

Summary of Changes

Adding a check if SCRIPT_NAME starts with a / or if HTTP_HOST ends with a /
If both checks are false add a / to prevent invalid URLs

Testing Instructions

This line fails
php cli/joomla.php scheduler:run -i 1 --live-site 'http://localhost:43000'

number 1 is the rotate Logs task, but it happens with any other as well

for testing this framework PR is needed as well joomla-framework/application#123

Actual result BEFORE applying this Pull Request

Expected result AFTER applying this Pull Request

Successful run

Link to documentations

Please select:

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[HLeithner]

composer update is unrelated. Beside that a url starts always with a slash so a live site looks always like https://example.com/ the last / is the identifier of the location. But I don't care if others thinks it's ok then it can be merged (wouldn't do it in 4.x branch at least)