view .arcconfig @ 50281:f34887316f1f stable

undo-files: factor the vfs map in a repository property

We define it in multiple locations and inconsistencies are appearing. So we now
have a single definition point.

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