.arcconfig

changelog-v2: add a configuration to disable rank computation

We encountered a graph where rank computation was pathologically slow. We add an
option to disable this computation while this is getting fixed.

Disabling the rank computation should allow for testing other changelog-v2
features undisturbed (like changeset-based copy tracing).

I am purposely not adding a test for the new non-default code path, as this is
a temporary work around of an experimental feature.

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