mark all bits of the signature as used
mark all bits of the signature as used

the first byte of a bit string marks how many bits should be
subtracted, make sure this doesn't get set.

akgood/yubico-piv-tool,akgood/yubico-piv-tool,ato/yubico-piv-tool,ato/yubico-piv-tool,hirden/yubico-piv-tool,akgood/yubico-piv-tool,Yubico/yubico-piv-tool,Yubico/yubico-piv-tool,hirden/yubico-piv-tool,akgood/yubico-piv-tool,Yubico/yubico-piv-tool