Ability to disable sending implicit RR when sending a msg

use case is a bot which should be able to send msgs on your behalf without changing your RR state

The issue names no files, tests, or entry points. Start by locating the specification section that defines implicit RR behavior when sending a message, then determine how an opt-out would be represented and its effect on RR state. Done means the protocol behavior and configuration are specified clearly enough to cover the bot use case.

Written by the indexing model from the issue text.