Configuration profiles.
A builtin profile provided by the Grader, in the form of config.<profile>.properties in the resources directory.
config.<profile>.properties
The default profile defined in config.properties.
config.properties
An external profile loaded from a filesystem location.
The active directory when using this profile.
Creates a new InputStream to read from the configuration file.
Resolves relPath against the active directory of this profile. Does nothing if relPath is an absolute path.