Merge tag 'migration-20230426-pull-request' of https://gitlab.com/juan.quintela/qemu into staging

Migration Pull request (take2)

With respect to the last PULL request:
- fix compilation on hosts without userfaultd.

Please, apply.

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# gpg:                 aka "Juan Quintela <quintela@trasno.org>" [undefined]
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# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 1899 FF8E DEBF 58CC EE03  4B82 F487 EF18 5872 D723

* tag 'migration-20230426-pull-request' of https://gitlab.com/juan.quintela/qemu:
  vmstate-static-checker: Recognize "num" field
  migration/vmstate-dump: Dump array size too as "num"
  migration: Allow postcopy_ram_supported_by_host() to report err
  migration: Move qmp_migrate_set_parameters() to options.c
  migration: Move migrate_use_tls() to options.c
  MAINTAINERS: Add Leonardo and Peter as reviewers
  migration: Disable postcopy + multifd migration

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