Minor wording fixes. (mainly igor -y)

Differential Revision:	https://reviews.freebsd.org/D657
Reviewed by:	wblock
Sponsored by:	Absolight


git-svn-id: svn+ssh://svn.freebsd.org/doc/head@45540 c2e8774f-c49f-e111-b436-862b2bbc8956
Minor wording fixes. (mainly igor -y)

Differential Revision: https://reviews.freebsd.org/D656
Reviewed by:	wblock
Sponsored by:	Absolight


git-svn-id: svn+ssh://svn.freebsd.org/doc/head@45541 c2e8774f-c49f-e111-b436-862b2bbc8956