when used as a maven1 proxy, Archiva should handle relocation from maven2 poms

When a maven1 client asks for /servletapi/jars/servletapi-2.4.jar, Archiva converts path to the maven2 location of this artifact. As maven1 has no relocation support, the jar is required in the repo.
Archiva can be more that a proxy : download the artifact POM, read relocation infos, and return the relocated jar.

attached Patch add a new "applyRelocation" to DefaultProxyManager.
I've tried this code with the servletapi example, but it may be bad designed as I just discovered maven / archiva APIs.