Following changes in the English version are merged:
backups/chapter.sgml 1.15 -> 1.25
bibliography/chapter.sgml 1.22 -> 1.23
cutting-edge/chapter.sgml 1.48 -> 1.51
policies/chapter.sgml 1.14 -> 1.17
Submitted by: IKENO Naoki <nao@mc.kcom.ne.jp>
Reviewed by: Hori Masato <mho@pobox.com>,
Shun SUZUKI <si006@ccm.gs.niigata-u.ac.jp>