Added a link to WWW PR form and to "Writing FreeBSD PRs" with text,
and:

Changed "-doc" to "<tt>FreeBSD-doc</tt>" twice.

Added the hypen in "plain-text documents".

Changed "e-mail" to FDP's "email" thrice.

Removed useless "r" from: diff -ru foo.sgml.old foo.sgml > foo.diff

Approved by: keramida (mentor)