Changelog:
===========
- Add support for deprecating specific hook parameters, or more generally, for
issuing a warning whenever a hook implementation requests certain parameters.
- PluginManager.get_plugins() no longer returns None for blocked plugins.
(From OE-Core rev: 0a6fe31e8fbf0c70a488b7cb10bab3a4d729ec34)
Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
