Various code (like src2asciidoc.py) relies on all @cmdutils.register
decorators being called when qutebrowser.app is imported.
Moving the keyconf import to _init_key_config broke that assumption, as
keyconf isn't imported anywhere anymore - which caused :bind and :unbind
to vanish from the generated documentation.
In the long run we should perhaps use venusian:
http://docs.pylonsproject.org/projects/venusian/
But for now, this is the easiest solution.
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