While Section 4.17.7 of the YP Reference Manual makes it clear that "features_check class replaces distro_features_check", the glossary entry on the latter (Section 6.30) does not mention its deprecation, there is no glossary entry for the former, and there are still a number of references in the Manual to the latter.
Fixing this will also involve adding glossary entries for all of the new tests, such as ANY_OF_DISTRO_FEATURES, REQUIRED_COMBINED_FEATURES and so on, so lots of additions to do to clean this up.
First pass at patch submitted to docs list, waiting for feedback.
This was submitted to the docs list, can someone check it out and yea or nay?
http://git.yoctoproject.org/cgit.cgi/yocto-docs/commit/?id=274eb596582a22883e8b386a07cf32ed45a77d79