Polish the prefix support introduced in commit a8592f36d4 and fix a
package tangle between `boot.context.properties.source` and `boot.env`.
The `Prefix` interface has now been moved into a new default method on
`OriginLookup`.
See gh-3450
Polish the prefix support introduced in commit a8592f36d4 and fix a
package tangle between `boot.context.properties.source` and `boot.env`.
The `Prefix` interface has now been moved into a new default method on
`OriginLookup`.
See gh-3450