Get a configuration value, returning a None if not set
Get a configuration value as a boolean, falling back to a default if not set
Get a configuration value as a double, falling back to a default if not set
Get a configuration value as an integer, falling back to a default if not set
Get a configuration value as a long, falling back to a default if not set
Get a configuration value as a string, falling back to a default if not set
Get a configuration value as a list of strings with "," separator, falling back to a default if not set