K 10 svn:author V 3 bhd K 8 svn:date V 27 2016-01-17T15:44:07.144069Z K 7 svn:log V 173 Update to r42984: Initial header tightening pass through this chapter, in prep for further work. Reviewed by: bcr Differential Revision: https://reviews.freebsd.org/D4956 END