Update option message for RT options
This PR updates the message shown for RT messages.
- The RT prio message is outdated and is misleading. The priority can be set in a normal system. The only requirement is to set the corresponding permissions to set a RT priority. This can be done by editing
/etc/security/limits.conf
or by using sudo. - The CPU affinity option doesn't require any permission. I added an example because is not obvious what is the expected input format.