Adds the ability to run discovery for just one host

Overseer’s auto-discovery wizard is a very quick way to get up and running monitoring your network servers in no time. Previously to 5.0, the only way to use it, was to discover hosts from active directory, however. With Overseer 5.0, I’ve added the ability to enter a list of servers/host manually. This can be just one, or many. This is a great way to add monitoring for just one new server.