.arcconfig

resolve: respect ui.relative-paths also for warning messages

I guess this should have been part of 72a9aacff645 (resolve: respect
ui.relative-paths, 2019-01-29).

Differential Revision: https://phab.mercurial-scm.org/D5937

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    "conduit_uri": "https://phab.mercurial-scm.org/api",
    "repository.callsign": "HG",
    "arc.land.onto.default": "@",
    "base": "hg:.^"
}