more regions
bump amo-validator and app-validator
fix wrong URL
Make MDN URLs correct so that no redirects by MDN are needed.
Merge pull request #889 from markgif/patch-3

Make MDN URLs correct so that no redirects by MDN are needed.
Version uploaded while another version is PUBLIC_WAITING goes to wrong queue (bug 868526)

If an app is in PUBLIC_WAITING state, then:
- get_version() should return the current PUBLIC_WAITING version
- update_status() shouldn't erase PUBLIC_WAITING when there is a new version
- When new versions are uploaded for that app, it should go in the update queue