Merge the following from the English version:

1.41 -> 1.42 includes.sgml
1.36 -> 1.37 internal/about.sgml
1.50 -> 1.53 security/security.sgml

1.4 -> 1.6 releases/4.3R/errata.sgml

Submitted by: SUGANO Kei <sugano@aurora.es.hokudai.ac.jp>
References: [doc-jp 8255]