MFen:
advanced-networking/chapter.sgml 1.382 -> 1.384
config/chapter.sgml 1.220 -> 1.221 [1]
disks/chapter.sgml 1.262 -> 1.263
firewalls/chapter.sgml 1.70 -> 1.71
install/chapter.sgml [2]
mac/chapter.sgml 1.67 -> 1.68
ports/chapter.sgml [3]
serialcomms/chapter.sgml 1.113 -> 1.116

book.sgml: provide link to latest cnsnap snapshot

Submitted by: delphij (updates),

		delhua <delhua gmail com> [1],
		YUAN Jue <yuanjue02 gmail com> [2],
		lveax <lveax m gmail com> [3]

Obtained from: The FreeBSD Simplified Chinese Project