Merge pull request #828 from emmanuel-keller/1.6

Workaround on #826.
Merge pull request #834 from emmanuel-keller/1.6

Fix #832
Merge pull request #838 from emmanuel-keller/1.6

Fix #836
Merge pull request #842 from emmanuel-keller/1.6

Fix #840. Downgrade HTMLCleaner to 2.7
Merge pull request #844 from emmanuel-keller/1.6

Better redirection handling, auto adress discovery
Merge pull request #847 from emmanuel-keller/1.6

Update change log