Update copyright and debian files.

Conflicts:

	debian/changelog
Misprint.
Extract BSD-2-clause into separate License block
Clarify that uthash license is not BSD-2-clause
Clarified with author that Debianization is BSD-2-clause, not GPL
Move license texts to separate License blocks
Update source location
Update watch file (source code moved to GitHub)
Remove cruft
rspamd is now a native Debian package
Remove changelog entries for Debian upload
Put myself into Maintainer field
Remove watch file from native package
Merge remote-tracking branch 'dottedmag/0.6' into rspamd-0.6
Merge remote-tracking branch 'dottedmag/debian' into rspamd-0.6

Conflicts:
	debian/copyright
	debian/watch
Merge branch 'rspamd-0.6' of github.com:vstakhov/rspamd into rspamd-0.6