Munin plugin to show mumps process memory usage

[Derek_]

It is sometimes useful to see the memory usage of the mumps processes and to see which ones are large or growing. This plugin would provide a graph similar to the system memory graph, but the total memory would be the amount used by all mumps processes of an instance, and it would show the several largest of those processes as parts of the total with the remaining processes grouped by the same types as identified in the openvista_processes_ plugin.