[Tagging] highway=residential_link

[Joachim]

Many see _link only as slip roads. But using it for at-grade junctions
like described in the wiki has one advantage: _link is usually tagged
without a name because it connects two named roads and has none
itself. Using no link gives many warning in QA tools. Using
highway=residential plus noname=yes might be a workaround in the
current situation.

Examples where unclassified_link and residential_link might fit:
https://www.openstreetmap.org/way/286954889
https://www.openstreetmap.org/way/193840995
https://www.openstreetmap.org/way/155949371
https://www.openstreetmap.org/way/286954889