rescue: added rescue+fs pkglist

The changes in commits gb3e3234 and ga860b17 were actually useless
as rescue+fs list wasn't included into RESCUE_LISTS... and I need
pv(1) for convenient local disk cloning with time estimate.
rescue+backup: dropped duplicity

I've managed to overlook that it pulls in libX*...
rescue+misc: added two more deduplication utilities

My personal favourite one is hardlinkpy currently
(thanks ldv@) but a few others might be handy as well.
branding: support refind branding

Everything is handled within mki-copy-efiboot currently
but it needs an image to process; extracting one from
bootloader branding seems less hassle than forcing it
into every flavour of branding.
1.1.17-alt1

- refind branding
gear-store-tags