Resolution of SWH-IDs fails with trailing slashes in the origin field

Resolution of SWH-IDs fails with 404 if there is a trailing slash in the origin field, followed by a semicolon, as in the following

https://archive.softwareheritage.org/swh:1:cnt:c60366bc03936eede6509b23307321faf1035e23;origin=https://github.com/sagemath/sage/;lines=473-537

while it works if we swap the parameters, as in the following

https://archive.softwareheritage.org/swh:1:cnt:c60366bc03936eede6509b23307321faf1035e23;lines=473-537;origin=https://github.com/sagemath/sage/

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Migrated from T2289 (view on Phabricator)