Merge the following from the English version:

1.15 -> 1.16 internals/chapter.sgml
1.56 -> 1.57 mirrors/chapter.sgml
1.25 -> 1.26 pgpkeys/chapter.sgml
1.24 -> 1.25 security/chapter.sgml

Submitted by: Naoto Kaneko <dui@360.cc>

		Hiroki Sato <hrs@geocities.co.jp>

Reviewed by: Hiroki Sato <hrs@geocities.co.jp>
References: [doc-jp 7143,7149]