special handling of status code 301, 302 and other redirects

[gernotstarke]

the new URL is given in the response, we should collect this info and report it back to users!

[thc202]

The same could be done for 302, 303, 307, and 308. All of them can have a Location header field.

[gernotstarke]

thx for the info. Will implement special handling later today - in branch 1.0.0-RC-3