Update copyright and debian files.
Misprint.
Merge remote-tracking branch 'dottedmag/debian' into rspamd-0.6

Conflicts:
	debian/copyright
	debian/watch

Conflicts:

	debian/changelog
Rework LRU hash logic.
Fix empty messages processing.
Remove judy and use glib hash tables.

There is no significant advantage to use Judy arrays over glib
HashTables to store hashes in fuzzy storage. Therefore, drop support of
Judy completely. Also rename `use_judy` parameter to `strict_hash`
indicating that hashes are matched strictly (not a fuzzy match but a hash
lookup).
Move xxhash to contrib.
Rework bloom hash library to use XXHash.