Merge the following changes in the English version:

availability.sgml 1.19 -> 1.20
docs.sgml 1.75 -> 1.78
includes.sgml 1.30 -> 1.32
index.sgml 1.67 -> 1.73
publish.sgml 1.32 -> 1.33
send-pr.sgml 1.16 -> 1.17
support.sgml 1.171 -> 1.181
where.sgml 1.40 -> 1.41
alpha/alpha.sgml 1.4 -> 1.5
docproj/current.sgml 1.18 -> 1.19
docproj/sgml.sgml 1.12 -> 1.13