Remove 'eavesdrop' from the default session.conf
Eavesdropping has been depercated in favor of monitoring for a long time, let us disable it in the default configuration, and rather let individual distros or admins opt-in to this as necessary.
The impact should be limited, as this was mainly used as a debugging tool.
Signed-off-by: Tom Gundersen teg@jklm.no