NEWS for Sigsum tools, v0.10.1

	The main changes in this version are support for the vkey
	format and an update of the Sigsum proof format. For details,
	see the updated documentation in doc/tools.md and
	doc/sigsum-proof.md, and the corresponding proposals:

	  https://git.glasklar.is/sigsum/project/documentation/-/blob/main/proposals/2024-11-vkey-conversion-tools.md
	  https://git.glasklar.is/sigsum/project/documentation/-/blob/main/proposals/2024-11-proof-with-no-leaf-checksum.md

	Incompatible changes:

	* sigsum-key: Subcommands have been renamed, as follows:

	  "gen" --> "generate"
	  "hash" --> "to-hash"
	  "hex" --> "to-hex"
	  "hex-to-pub" --> "from-hex"

	* sigsum-witness: Delete support for the old non-checkpoint
	  witness protocol.

	* sigsum-submit: Sigsum proof format updated to version 2.

	New features:

	* sigsum-key: New subcommands to-vkey and from-vkey.

	* sigsum-verify: Add support for the version 2 Sigsum proof
	  format. For backwards compatibility, support for version 1
	  is kept.

NEWS for Sigsum tools, v0.9.1

	New features:

	* sigsum-witness: Updated to support the checkpoint-based
	  witness protocol defined by
	  https://github.com/C2SP/C2SP/blob/tlog-checkpoint/v1.0.0-rc.1/tlog-witness.md.

NEWS for Sigsum tools, v0.8.2:

	Incompatible changes:

	* Building now requires go version 1.22 or later.

	New features:

	* Add --version option to all tools.

NEWS for Sigsum tools, v0.8.0:

	New features:

	* sigsum-verify: Support multiple submitter public keys.
