Merge the following from the English version:

1.21 -> 1.24 kerneldebug/chapter.sgml
1.14 -> 1.16 kernelopts/chapter.sgml

Submitted by: IKENO Naoki <nao@mc.kcom.ne.jp>
Reviewed by: Hiroki Sato <hrs@geocities.co.jp>
References: [doc-jp 1552]