Log Message:
Update to 0.9.9. Changes:
- Implement an idea from Lex van Roon <r3boot@r3blog.nl.eu.org> providing
  an alert/heartbeat deletion performance improvement in the order of
  3000% (preludedb-admin already benefit from it, next Prewikka release
  will benefit from it too).
- Fix --with-(perl|python|swig) detection path ordering.
- Verbose error reporting on logfile opening error.
- Various bug fixes.