(XML source change only - no change to the text.)
* doc/book/book/appa.xml
* doc/book/book/ch00.xml
* doc/book/book/ch02.xml
* doc/book/book/ch03.xml
* doc/book/book/ch04.xml
* doc/book/book/ch05.xml
* doc/book/book/ch07.xml
* doc/book/book/ch09.xml
Regularise the names and formatting of section identifiers. In particular:
svn-ch-0-sect3.1 and 3.2 -> svn-ch-0-sect-3.1 and 3.2
svn-ch-3-sect-5 -> svn-ch-3-sect-5
with subsections 4.x -> with subsections 5.x
svn-ch-3-sect-6 -> svn-ch-3-sect-6
with subsections 5.x -> with subsections 6.x
svn-ch-5-sect-1.2.A -> svn-ch-5-sect-1.3
with subsections 1.3 and 1.4 -> with subsections 1.3.1 and 1.3.2
