When following redirects for the rootUrl, the rootUrl can get scanned twice

```
$ php bin/scanner.php https://www.wijs.be/en
Scanning https://www.wijs.be/en/
[2014-12-10 18:18:32] 00000 - https://www.wijs.be/en/
> Updated rootUrl to https://wijs.be/en/
[2014-12-10 18:18:32] 00001 - https://wijs.be/en/internships
[2014-12-10 18:18:32] 00002 - https://wijs.be/en/jobs
[2014-12-10 18:18:32] 00003 - https://wijs.be/en/
> Updated rootUrl to https://wijs.be/en/
[2014-12-10 18:18:32] 00004 - https://wijs.be/en/services
[2014-12-10 18:18:33] 00005 - https://wijs.be/en/about-wijs
[2014-12-10 18:18:33] 00006 - https://wijs.be/en/contact
[2014-12-10 18:18:33] 00007 - https://wijs.be/en/services/strategy-concept
[2014-12-10 18:18:33] 00008 - https://wijs.be/en/services/designing-building
[2014-12-10 18:18:33] 00009 - https://wijs.be/en/services/generating-traffic
[2014-12-10 18:18:34] 00010 - https://wijs.be/en/portfolio/detail/world-scout-education-congress
- http://www.facebook.com/plugins/like.php?href=https://wijs.be/en/portfolio/detail/world-scout-education-congress&send=false&layout=button_count&show_faces=false&colorscheme=&font=&height=21
- http://platform.linkedin.com/in.js
[2014-12-10 18:18:34] 00011 - https://wijs.be/en/services/strategy-concept/context-study

...
```

This is most likely triggered by the forcing of the trailing `/` on URLs. Needs further investigation.

Start by running php bin/scanner.php with a redirecting root URL such as https://www.wijs.be/en and trace how the rootUrl and trailing slash are handled. The work is complete when the redirected root URL is scanned only once while the remaining links are still discovered.

Written by the indexing model from the issue text.