Image rendering broken on sling.apache.org

While reviewing https://github.com/apache/sling-site/pull/19 we discovered that image links are rendered:

1. always with the sling.apache.org domain ( so images added locally will not be considered )
1. with a wrong path, no longer appending the parents of the current page

So the image links at both

• http://localhost:8820/documentation/development/ide-tooling.html
• https://sling.apache.org/documentation/development/ide-tooling.html

are broken, being rendered as http://sling.apache.org/ide-tooling/new-server.png, whereas they should be

• http://localhost:8820/documentation/development/ide-tooling/new-server.png
• https://sling.apache.org/documentation/development/ide-tooling/new-server.png