release.sh dates the heading when it cuts the tag, and refuses a bare
'## [1.6.1]' because it cannot tell an undated heading from one it has
already stamped. Shipping a tag whose public changelog says UNRELEASED is
permanent and cannot be corrected inside that tag, so the check is right
to stop rather than guess.
Bump to 1.6.0 (workspace sync, no functional change). Fix the README
example that called the removed matches()/unlock() API — rewrite to the
real unlock_features()/unlock_bus() contract (+ ld/README).
The unlocker performs the DVD bus-auth that clears the drive's
scrambled-read barrier, letting a protected DVD be read at all. That is
a property of the DVD medium, not of the CSS scheme — the descramble key
is recovered keylessly downstream — so naming it "CSS" conflated the
read-enable with the encryption. Rename the struct to DvdUnlocker, its
registry name to "DVD", and the tests to match. Bump 1.5.2.
Matthew Jackson