Handle 308 HTTP code for redirect

[sileht]

Hi,

This change handles 308 http code for permanent redirect

Cheers,

[mmerickel]

+1 LGTM

[digitalresistor]

This status code comes from https://datatracker.ietf.org/doc/rfc7538/?include_text=1

Unfortunately Google and others have also been using it for "Resume Incomplete", but I'll take RFC over some proposal that is non-RFC.

[mmerickel]

This ticket[1] was compelling on the fact that google is supportive of the 308 rfc and it doesn't break any of their services.

[1] https://bugzilla.mozilla.org/show_bug.cgi?id=714302

[digitalresistor]

Perfect. So if the above issues get fixed, I'll pull this in :-)

[sileht]

I guess we can merge, so :)

[digitalresistor]

@sileht There are a couple of typo's to still clear up.

[sileht]

I have fixed the typos

[digitalresistor]

You've removed a whole bunch of PY3 statements, and added a typo in one document that causes things to fail on PY3...

Please run tox locally, it will help you catch these errors. You can see the errors here: https://travis-ci.org/Pylons/webob/builds/78042379

[sileht]

Sorry I push the wrong branch, this PL is just about 308.