view .arcconfig @ 50764:8ff187fbbfea

rust-config: add config getters that don't fall back to defaults

This is useful in cases where we access config items that are more... lenient
with their types than a fresh new system would allow.

For now there is only a single use of this, but we might get more later.

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