Pass on redirect path instead of URL
Pass on redirect path instead of URL

Fixes https://github.com/openfoodfoundation/openfoodnetwork/issues/2376

The checkout doesn't deal with absolute URLs since
fc2cc09ea5e6c123243dac27b0f5dff601ac518b.

openfoodfoundation/openfoodnetwork,mkllnk/openfoodnetwork,openfoodfoundation/openfoodnetwork,lin-d-hop/openfoodnetwork,mkllnk/openfoodnetwork,openfoodfoundation/openfoodnetwork,lin-d-hop/openfoodnetwork,oeoeaio/openfoodnetwork,oeoeaio/openfoodnetwork,openfoodfoundation/openfoodnetwork,oeoeaio/openfoodnetwork,lin-d-hop/openfoodnetwork,Matt-Yorkley/openfoodnetwork,Matt-Yorkley/openfoodnetwork,mkllnk/openfoodnetwork,Matt-Yorkley/openfoodnetwork,oeoeaio/openfoodnetwork,lin-d-hop/openfoodnetwork,Matt-Yorkley/openfoodnetwork,mkllnk/openfoodnetwork