Stylish changes... put tabs where they need to be in macros, move lines
around so that related things are more grouped together, rewrite comments.

No functional changes, this is all so that the functional changes in the
next commit will stand out.


git-svn-id: svn+ssh://svn.freebsd.org/base/head@276202 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f