.arcconfig

salvaged: record salvaged in ChangingFiles at commit time

The new code is a simple but effective way to detect this information. We might
be able to move it inside the various conditionnal above, but I want to focus
on simplicity until we have a full working stack.

It is worth noting that if we record the information in the ChangingFiles
object, it is not persisted yet. This will comes with later changesets.

Differential Revision: https://phab.mercurial-scm.org/D9120

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