Hi guix,

This patchs configures the ipfs service to allow
read access via http://localhost:8082/ipfs/THE-OBJECT.
Previous, it redirected to a subdomain of localhost,
but the required DNS trickery does not yet exist for
Guix System, so that redirect failed.

I added a system test for testing this functionality
(make check-system TESTS=ipfs). Not yet tested on a ‘real’ system,
though I don't expect any issues.

Greetings,
Maxime.