Log Message:
Update to 3.5.8:

NEW IN VERSION 3.5.18
---------------------
- Renamed djview as djview3.
- Various enhancement of DDJVUAPI.
- Partial support for page titles instead of page numbers.
- Clarification of metadata information.
- Fixed djvumake mask separation feature.
- Complain when given a so-called "secure" djvu file.
- Fixed handling of urls with cgi arguments
- Fixed bug related to caching and ddjvuapi
- Reorganized ${datadir}/djvu
- Provide scripts in ${datadir}/djvu/*/desktop to register
  the djvu mime types and the djview menu entries.