Merge remote-tracking branch 'mvo/debian/sid' into debian/sid
update changelog
vendor/ubuntu/sources.list.in: whitespace fix
prepare release
l10n: vi.po(617t): Update Vietnamese translation

Signed-off-by: Trần Ngọc Quân <vnwildman@gmail.com>
l10n: vi.po (617t): Update translation up to v0.9.14.2

Signed-off-by: Michael Vogt <mvo@debian.org>
apt-pkg/acquite-item.cc: correct IndexDiff vs DiffIndex references
add HandleMessage function to allow overriding 600 handling
First pass reworking of rred method to allow applying all the diffs in a single pass
bump changelog
efficient rred, yay