Fix parsing of CONFIG_WELL_KNOW_* env variables
This change makes the CONDUIT_WELL_KNOWN_CLIENT
and CONDUIT_WELL_KNOWN_SERVER
actually work for the automatic delegation feature
Currently the JSON returned by both /.well-known/matrix/
endpoints contain the value of CONDUIT_SERVER_NAME
Based on the investigation done in the Conduit Matrix Server. Not sure if a more elegant solution is needed or that will be addressed by !706 (merged)