Here is some information that I received:
The purpose is to serve client libs hosted under /libs and /apps
- add the property: allowProxy = 'true' to a clientlib
- the clientlib will then be proxied via /etc.clientlibs/..., bypassing access control set on the clientlib.
example:
Assume you have clientlib in /apps/myproject/clientlibs/foo. then you set the property /apps/myprojects/clientlibs/foo/allowProxy to true and then you can request: /etc.clientlibs/myprojects/clientlibs/foo.js.
I have created a documentation issue to have the information added to the docs.
Hope that helps,
scott