Merge tag 'pull-char-2024-02-12-v2' of https://repo.or.cz/qemu/armbru into staging

Merge tag 'pull-char-2024-02-12-v2' of https://repo.or.cz/qemu/armbru into staging

Character device backend patches for 2024-02-12

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# gpg: Signature made Wed 14 Feb 2024 06:45:33 GMT
# gpg:                using RSA key 354BC8B3D7EB2A6B68674E5F3870B400EB918653
# gpg:                issuer "armbru@redhat.com"
# gpg: Good signature from "Markus Armbruster <armbru@redhat.com>" [full]
# gpg:                 aka "Markus Armbruster <armbru@pond.sub.org>" [full]
# Primary key fingerprint: 354B C8B3 D7EB 2A6B 6867  4E5F 3870 B400 EB91 8653

* tag 'pull-char-2024-02-12-v2' of https://repo.or.cz/qemu/armbru:
  qapi/char: Deprecate backend type "memory"
  qapi/char: Make backend types properly conditional
  tests/unit/test-char: Fix qemu_socket(), make_udp_socket() check
  chardev/parallel: Don't close stdin on inappropriate device

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>