Motivation

Now that bench as the option to set a limit (see #1360) I think it would be really good to also have this for the simulate situation.

At the moment:

/app # mqttx simulate -sc weather -c 10 -i 10 -im 500 --limit 100 -t benchmark/test%i
error: unknown option '--limit'

Detailed design

Having the -L with simulate.

Thanks for the great tool !