Ref T4245. Prepare these scripts for a callsign-free world. This also makes them more flexible and easier to use.
The following are now valid ways to identify a repository for these scripts: ID (3), PHID (PHID-REPO-wxyz), R<ID> (R3), r<CALLSIGN> (rSKYNET), CALLSIGN (SKYNET).
In the future, a human-readable label (skynet) may also become valid.