Comment 11 for bug 1537071

I discussed this on #openstack-swift and surprisingly, Clay et.al. were in favour of additional configuration. I came around to this approach too, when I found that my stunnel does not provide any kind of header at all and thus the automatic guessing is impossible.

Here's a proposed patch:
 https://review.openstack.org/372809

Note that this still needs OOO or other orchestration to set url_base. With the patch above, one can set url_base to "https://", in which case hostname is taken from Host: header as usual.