Galera monitor: Minimum cluster size and/or refuse two cluster IDS in 1 cluster

I think 2 extra features in the Galera monitor module would be a good addition to MaxScale.

If we have a 3 node galera cluster and somebody accidently bootstrap each one (or 2) of them, MaxScale would currently send traffic to all nodes allthough they are not in a cluster together.

I think there are 2 ways to avoid this in the MaxScale monitor, option 1 is easy and option 2 is elegant.
1: Config parameter with the minimum cluster size. If any node is up but the minimum cluster size is too low, consider the node down.

2a: If there are several cluster identifiers present in the list of servers MaxScale knows about, only consider the servers with cluster identifier that occurs at least 1 time more then the other identifier(s)
2b: If there are several cluster identifiers present in the servers MaxScale knows about do not consider any of the nodes up