luksblk: always detach headers, and group some commands together for usability
rsconf: add an "export" variant of 2-tier
rsconf: tweak scheme timings
rsconf: add a "run" subcmd to wrap rsnapshot, so we can clean up tempfiles and run pre/post hooks
rsconf: install crontab automatically
luksblk: don't fail redundant subcmds; add blk_* prefix to blk subcmds
luksblk: automatically fill new devices with random data
apt-clean: cleanup temp file