prologue: Remove dead linuxhq.com link

No longer available.
foreword: List archs actually supported

Just MIPS, ARM, and x86.
foreward: Add Andrew Bradford as CLFS Developer
foreword: Fix grammar

"supporting" not "support"
typography: Remove mention of installed man

Embedded doesn't install man to the target.
organization: Match actual appendicies

Due to recent changes removing some appendix.
create-dir: Remove remnants of partitioning
create-dir: Wrap CLFS var in {}

For consistency.
materials-intro: Remove cross-lfs.org link

The contents found at the link are horribly outdated and thus not
useful.  Google will turn up much better results for recent packages.
final-prep: Don't install ${CLFS}

Should already be present due to create-dir section.
hostreqs: Add sudo

Make it easier to perform root commands, most distros now have users
setup to use sudo for root operations already.
addinguser: Use sudo

Rather than logging in as root, it's just more convenient.
creatingfiles: Note additional users/groups as optional

None are required, make that more clear.