MFen:
1.24 -> 1.26 Makefile
1.3 -> 1.4 chapters.ent
1.2 -> 1.4 mailing-lists.ent
1.1 -> 1.2 newsgroups.ent
1.35 -> 1.50 authors.ent
1.11 -> 1.15 advanced-networking/chapter.sgml
1.8 -> 1.11 backups/chapter.sgml
1.9 -> 1.11 basics/chapter.sgml