v40.7.1 omits port in index download

[kokoska69]

In this commit 3a351aa is used host instead of netloc, but host does not contain port. Version 40.6.3 works OK.

[jaraco]

Sorry about the regression. After re-reading the diff, I can see the issue, which was probably brought on by the naming of 'host' when it meant 'netloc'. Fix should be straightforward.