'all' match added. Better header parsing. Behavior of test mode change.

'all' match added. Better header parsing. Behavior of test mode change.

* Added 'all' match. It's always matching any mail.
  It allow catchall rule.
* Better header parsing. Headers were not normalized for blank
  when using a partial match (.domain/.address/.name). Part
  name '.raw' added ('from.raw' is equivalent to 'from'.)
* Test mode behavior changed. Now, it list summary of matching
  rules.
* Fixed a bug on the output when checking a configuration (with -c).
git-archimport-id: frederic@jolliton.com--2004-private/mail-filter--main--0.1.1--patch-3