Markup fixes for kqueue(2), no content changes.

Reviewed by:	brueffer (previous version)
Sponsored by:	The FreeBSD Foundation
MFC after:	3 days


git-svn-id: svn+ssh://svn.freebsd.org/base/head@275806 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f