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)

changed title from Fix parsing of CONFIG_WELL_KNOW_ env variables into the internal configuration object* to Fix parsing of CONFIG_WELL_KNOW_ env variables*

merged

mentioned in commit c4810a3a

mentioned in issue #474 (closed)

This issue was already addressed by !706 (merged), this just makes things inconvenient for toml users.