Version Control With Subversion Source

Add a section to Chapter nine listing the Apache configuration
directives for Subversion.

* src/en/TODO: update.
* src/en/book/ch09.xml (svn-ch-9-sect-6): New section of Apache directives.

Add HACKING policy about line length.

Fix false statement about location of book source.
Reported by Gissehel <gissehel-svnbook@...>.

* en/book/ch00.xml (svn-ch-0-sect-5): Re-word.

Knock out a TODO task.

* src/en/book/ch03.xml: Add warning about restructuring your working
copy without letting svn know.

* src/en/TODO: Remove task.

* src/en/book/ch03.xml (svn-ch-3-sect-5): Fix xml markup error.

Book Spanish. Translated four paragrahs.

Maybe, just maybe, make a commit not covered in idiocy. For an algorithm
*I conceived*, I sure seem to be having trouble describing it. Fortunately,
there's Ben, whose brain is (for now, at least) still functional.

* src/en/book/ch07.xml
Don't call an "at sign" an ampersand, but do show the literal glyph.
And leave a placeholder for the peg revision algorithm.

Minor corrections, spurred by Ben.

* src/en/book/ch07.xml
(Addressing Historical Ambiguity): fix a few typos, add a to-do comment.

Book Spanish. Translated two paragraphs.