lucy24 - 8:35 pm on Jul 19, 2013 (gmt 0)
The foregoing would be more intelligible if the meaning of "should be opened" were absolutely unambiguous.
Yes, every page of your site should be accessible to visitors who start out using the wrong protocol. But any given page should be redirected to one protocol or the other. In this respect it's exactly analogous to domain-name canonicalization, with or without www.