Merge the following from the English version:
1.58 -> 1.93 books/handbook/l10n/chapter.sgml
Submitted by: Hiroo Ono <hiroo at oikumene dot gcd dot org>
Reviewed by: Ryusuke Suzuki <ryusuke at nucl dot sci dot hokudai dot ac dot jp>
References: [doc-jp-work 822, 871, 872, 873, 905]