Merge tag 'misc-next-pull-request' of https://gitlab.com/berrange/qemu into staging

Misc VNC, I/O, Crypto & checkpatch changes

* Fix VNC tight encoding with 8/16-bpp formats with
  mixed endian server/client
* Fix VNC non-tight encoding with mixed endian server/client
* Drop built-in AES impl from non-TCG usage, requiring
  nettle/gcrypt/gnutls
* Fix validation of SPDX-License-Identifier in new files
* Mandate SPDX-License-Identifier in Rust source
* Reject license boilerplate in new files
* Add full control over TCP keep alive setting for sockets

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* tag 'misc-next-pull-request' of https://gitlab.com/berrange/qemu: (23 commits)
  scripts/checkpatch.pl: mandate SPDX tag for Rust src files
  util/qemu-sockets: Introduce inet socket options controlling TCP keep-alive
  util/qemu-sockets: Refactor inet_parse() to use QemuOpts
  util/qemu-sockets: Add support for keep-alive flag to passive sockets
  util/qemu-sockets: Refactor success and failure paths in inet_listen_saddr()
  util/qemu-sockets: Refactor setting client sockopts into a separate function
  io: Fix partial struct copy in qio_dns_resolver_lookup_sync_inet()
  scripts/checkpatch: reject license boilerplate on new files
  scripts/checkpatch: reimplement mandate for SPDX-License-Identifier
  scripts/checkpatch: use new hook for MAINTAINERS update check
  scripts/checkpatch: expand pattern for matching makefiles
  scripts/checkpatch: use new hook for file permissions check
  scripts/checkpatch: use new hook for ACPI test data check
  scripts/checkpatch: introduce tracking of file start/end
  scripts/checkpatch.pl: fix various indentation mistakes
  Revert "scripts: mandate that new files have SPDX-License-Identifier"
  crypto: fully drop built-in cipher provider
  tests: fix skipping cipher tests when AES is not available
  tests: skip legacy qcow2 encryption test if AES is not available
  tests: skip encrypted secret tests if AES is not available
  ...

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>