Moved mysql.de.texi from mysql-4.0 tree to mysqldoc tree.

Replaced mysql.de.texi in mysql-4.0 tree with dummy placeholder.
Moved world.sql sample database to mysqldoc tree.


BitKeeper/deleted/.del-world.sql~6603b5c62c5bac53:
  Delete: Docs/world.sql
Docs/manual.de.texi:
  Moved mysql.de.texi from mysql-4.0 tree to mysqldoc tree.
  Replaced mysql.de.texi in mysql-4.0 tree with dummy placeholder.