Merge remote-tracking branch 'remotes/bonzini-gitlab/tags/for-upstream' into staging

Merge remote-tracking branch 'remotes/bonzini-gitlab/tags/for-upstream' into staging

* NetBSD NVMM support
* RateLimit mutex
* Prepare for Meson 0.57 upgrade

# gpg: Signature made Tue 04 May 2021 13:15:37 BST
# gpg:                using RSA key F13338574B662389866C7682BFFBD25F78C7AE83
# gpg:                issuer "pbonzini@redhat.com"
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" [full]
# gpg:                 aka "Paolo Bonzini <pbonzini@redhat.com>" [full]
# Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4  E2F7 7E15 100C CD36 69B1
#      Subkey fingerprint: F133 3857 4B66 2389 866C  7682 BFFB D25F 78C7 AE83

* remotes/bonzini-gitlab/tags/for-upstream:
  glib-compat: accept G_TEST_SLOW environment variable
  gitlab-ci: use --meson=internal for CFI jobs
  configure: handle meson options that have changed type
  configure: reindent meson invocation
  slirp: add configure option to disable smbd
  ratelimit: protect with a mutex
  Add NVMM Accelerator: add maintainers for NetBSD/NVMM
  Add NVMM accelerator: acceleration enlightenments
  Add NVMM accelerator: x86 CPU support
  Add NVMM accelerator: configure and build logic
  oslib-win32: do not rely on macro to get redefined function name

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