Refine translation and merge the following from the English version:

1.162 -> 1.163 handbook/book.sgml

Submitted by: Hashimoto <hsmtkk at gmail.com> (MFen : 1.162 -> 1.163)

		rushani (Refiene translation)
		Hiroo Ono <hiroo _at_ jp dot FreeBSD dot org>
			(Refine translation)

Reviewed by: Ryusuke Suzuki <ryusuke _at_ jp dot FreeBSD dot org>
References: [doc-jp-work 1674, 1906, 1907, 1922-1927]