Merge tag 'pull-nbd-2023-06-01-v2' of https://repo.or.cz/qemu/ericb into staging

nbd and misc patches for 2023-06-01

- Eric Blake: Fix iotest 104 for NBD
- Eric Blake: Improve qcow2 spec on padding bytes
- Eric Blake: Fix read-beyond-bounds bug in qemu_strtosz

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* tag 'pull-nbd-2023-06-01-v2' of https://repo.or.cz/qemu/ericb: (21 commits)
  cutils: Improve qemu_strtosz handling of fractions
  cutils: Improve qemu_strtod* error paths
  cutils: Use parse_uint in qemu_strtosz for negative rejection
  cutils: Set value in all integral qemu_strto* error paths
  cutils: Set value in all qemu_strtosz* error paths
  test-cutils: Add more coverage to qemu_strtosz
  numa: Check for qemu_strtosz_MiB error
  cutils: Allow NULL str in qemu_strtosz
  test-cutils: Refactor qemu_strtosz tests for less boilerplate
  test-cutils: Prepare for upcoming semantic change in qemu_strtosz
  test-cutils: Add coverage of qemu_strtod
  cutils: Allow NULL endptr in parse_uint()
  cutils: Adjust signature of parse_uint[_full]
  cutils: Document differences between parse_uint and qemu_strtou64
  cutils: Fix wraparound parsing in qemu_strtoui
  test-cutils: Test more integer corner cases
  test-cutils: Test integral qemu_strto* value on failures
  test-cutils: Use g_assert_cmpuint where appropriate
  test-cutils: Avoid g_assert in unit tests
  qcow2: Explicit mention of padding bytes
  ...

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>