Fix Incorrect info in Configuration Guide

(1) https://github.com/mariadb-corporation/MaxScale/blob/master/Documentation/Getting-Started/Configuration-Guide.md#galeramon
starts with this sentence
"The Galeramon monitor is a simple router designed for use with MySQL Galera cluster"
Instead it should say
"The Galeramon monitor is a simple monitor designed for use with MySQL Galera cluster"

(2) - Under read connection routing and read write splitter section : Please clarify what happens to client connection when a master node goes down or slave node goes down