Following changes in the English version are merged:

auditors.sgml: 1.20 --> 1.21
docs.sgml: 1.44 --> 1.45
gallary.sgml: 1.35 --> 1.36
includes.sgml: 1.16 --> 1.18
machines.sgml: 1.1 --> 1.3
mailto.sgml: 1.7 --> 1.8
send-pr.sgml: 1.4 --> 1.6
releases/2.2.6R/erratta.sgml: 1.6 --> 1.7
releases/2.2.5R/erratta.sgml: 1.4 --> 1.5

Submitted by: takas-su@is.aist-nara.ac.jp (Takashi Sugimura)