build packages w/ da revision ident
backports uses tilde
Add .arcconfig for arc/differential.
allow collector.d style configs

Summary: allow collectors to use .d style config dir's

Test Plan: tested against plexi01 w/ plexicollector

Reviewers: chris, dgera

Reviewed By: chris

Maniphest Tasks: T6976

Differential Revision: https://phrac.deviantart.net/D2363
~ not -
new build version --includes .d stuff
This includes the deviantart dastatsd.py collector.  We want to
deterministically batch metrics from collectors.  See: T7164
add local revision