Two monitors loaded at the same time result into not working installation

When two monitors are loaded the MaxScale installation the MaxScale does not accept any queries. The clients get ERROR 1045, failed to create a new session.

The documentation is slightly off on this point in the configuration guide: https://github.com/mariadb-corporation/MaxScale/blob/master/Documentation/Getting-Started/Configuration-Guide.md#monitor
As they are in 1 code block the mistake can be made to copy/paste the whole of it.

I don't know if you consider this a bug or user error (why would the async replication need to be monitored on a galera cluster?) but I thought to report it as it caused some confiusion.

If the issue is related to having any 2 monitors I think it should be fixed as you may want to monitor a cluster with two different plugins.