[collectd] VMware Guest SDK plugin for Collectd 5

[Jesse Reynolds]

So there's this patch on gerrit to add a VMware plugin, which is looking pretty appealing to me:

https://collectd.org/gerrit/#change,25

It's been reviewed by Florian, changes made by Keith, and then favourably reviewed again by Florian. ... I'm thinking of putting the patch in a pull request to make it easier to merge in, unless  you want to do this Keith? 

Jesse