These are extra fields not specified in NIP-02 that may be present in the stringified JSON of contacts events:
### Deprecated fields
These are fields that should be ignored or removed when found in the wild:
-`{<relay-url>: {"read": <true|false>, "write": <true|false>}, ...}`: an object of relays used by a user to read/write, but in favor of [NIP-65](65.md).
These tags may be present in multiple event kinds. Whenever a different meaning is not specified by some more specific NIP, they have the following meanings:
-`r`: a web URL the event is referring to in some way