Creates a server Configuration with loadConfiguration(Properties)
but also
sets the given rootDir property as a low-priority configuration option
with the key "play.server.dir".
Create a server Configuration object (a wrapper around a Typesafe Config object) given some Properties.
Create a server Configuration object (a wrapper around a Typesafe Config object) given some Properties. At this moment this just reads from server-reference.conf and from the given properties.
The properties to base the configuration on.