Return child contact uri instead of fake uri for fake persons
Return child contact uri instead of fake uri for fake persons

This allows direct pass-through of the uri; shields clients from uris
like "fakeperson:/N".

We concluded the client does not have to know if it's a fake person or
not, it was meant mostly for merging purposes, but we run uri
identification now, so this is not needed anymore.

Reviewed-by: David Edmundson

detrout/libkpeople-debian,detrout/libkpeople-debian,detrout/libkpeople-debian