session.timeout.ms was supplied but isn't a known config

[Barry Kaplan]

In connect-distributed.properties I have values like:

session.timeout.ms=120000


But at startup I get warnings like:

The configuration session.timeout.ms = 120000 was supplied but isn't a
> known config.


I'm getting these warnings for most settings (eg, internal.key.converter,
key.converter, but I really don't understand from the docs if most of the
configs are really needed).