The terminology regarding reference storage formats has been unified
across command-line options, environment variables, configuration
variables, and source code, standardizing on the phrase "ref storage
format" (e.g., `--ref-storage-format`, `'GIT_REF_STORAGE_FORMAT'`).
Additionally, the `--ref-storage-format` option has been updated to
accept payloads in the form `<format>://<payload>`.
* ps/ref-storage-format:
setup: allow "--ref-storage-format=" to specify a payload
setup: rename "init.defaultRefFormat" to "init.defaultRefStorageFormat"
t: rename GIT_TEST_DEFAULT_REF_FORMAT
setup: rename ref storage format environment variables
setup: refactor how we configure the ref storage format
refs: expose function to parse reference URIs
help: rename "default-ref-format" to "default-ref-storage-format"
builtin/rev-parse: rename "--show-ref-format" to "--show-ref-storage-format"
builtin/submodule: rename "--ref-format=" to "--ref-storage-format="
builtin/refs: rename "--ref-format=" to "--ref-storage-format="
builtin/clone: rename "--ref-format=" to "--ref-storage-format="
builtin/init: rename "--ref-format=" to "--ref-storage-format="
parse-options: allow for hidden aliases
fdb8395264