Provide a ZIM with redirection to a subpage

[kelson42]

So we can test the rendering of redirects is done well (with for each redirect an interaction with the HTML render)

Here is an example of code: test-redirect-subpage.zip

Here the command with: zimwriterfs -w index.html -I illustration.png -l eng -n test-redirect-subpage -t test-redirect-subpage -d test-redirect-subpage -c Kelson -p openZIM test-redirect-subpage test-redirect-subpage.zim