Description of configuration options for meta

Configuration option=Default value	Description
default_flavor=	(StrOpt) Default flavor to use
default_l3_flavor=	(StrOpt) Default L3 flavor to use
extension_map=	(StrOpt) A list of extensions, per plugin, to load.
l3_plugin_list=	(StrOpt) List of L3 plugins to load
plugin_list=	(StrOpt) List of plugins to load
supported_extension_aliases=	(StrOpt) Supported extension aliases