Merge following changes in the English version.

1.113 -> 1.114 authors.ent
1.21 -> 1.22 basics/chapter.sgml
1.277 -> 1.280 contrib/chapter.sgml
1.53 -> 1.56 cutting-edge/chapter.sgml
1.80 -> 1.81 mirrors/chapter.sgml
1.40 -> 1.41 pgpkeys/chapter.sgml
1.17 -> 1.18 policies/chapter.sgml
1.150 -> 1.151 staff/chapter.sgml