Include path in HTTP source repository type URI

[hliasa]

This fix allows HTTP source repository type URL in the form of "https://example.com/updates/subfolder". Before the fix the update URL would become (e.g. for app-v1.2.3.zip) "https://example.com/app-v1.2.3.zip" when it should be "https://example.com/updates/subfolder/app-v1.2.3.zip".

In case of a URL without a path, an empty string is returned:

URL: https://example.com/updates/v2
Scheme: string(5) "https"
Host: string(11) "example.com"
Path: string(11) "/updates/v2"
baseUrl: https://example.com/updates/v2

URL: https://example.com
Scheme: string(5) "https"
Host: string(11) "example.com"
Path: string(0) ""
baseUrl: https://example.com