Release 2022.1

This release adds transparent support for external sub-commands on the `ostree` binary.
Custom binaries present in PATH in the form of `ostree-<subcmd>` will be now used as a fallback for sub-commands that are not natively implemented.
For example, this means that a custom `/usr/bin/ostree-my-command` binary can be used to transparently provide `ostree my-command`.

Build logic has been updated to support both libfuse 2.x and 3.x.
Auto-detection is performed at configuration time, and the 3.x library is preferred from now on.
Legacy 2.x support will be deprecated and removed in the future.

Several fixes and safety improvements have been merged, also addressing some static analysis warnings.
The git submodule for `bsdiff` has been updated to latest upstream revision, picking up additional bound-checks and fixing CVE-2014-9862.

Git-EVTag-v0-SHA512: ed5805dfc07b9bc32fbd72d797de4c0db6c6130c0fbd550eb0b26cfee5726108c25ef040bbc9f9834495240c2ef3c05a3ba166d5e154e7516ae81db556f5ee9c
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