Merge tag 'pull-nbd-2025-11-13' of https://repo.or.cz/qemu/ericb into staging

NBD patches for 2025-11-13

- Fix NBD client deadlock when connecting to same-process server
- Several iotests improvements

# -----BEGIN PGP SIGNATURE-----
#
# iQEzBAABCAAdFiEEccLMIrHEYCkn0vOqp6FrSiUnQ2oFAmkWYUwACgkQp6FrSiUn
# Q2rYDgf/TQZ1UVkLhUvnH7RhF4y94tXpfVcl3/PObtis5mldZKkGlTEnFSZGJG4Y
# +ra/tdMS8ZBbTgXIAdR7tEp+n9YpWMLvYxcWcLpQQ2H3MXghtBGGjYHwkzppIvG+
# U3F8YdImbuOgR0V9NP0JWlk9DztsoRkiO3zaqLqvtwvzDXKPdjsMsGM13pHJVVru
# LdkM828Mrr8eu+DcAVFd7ZofftEgyd/E7IV1/0YCj3MaWR3BJ45gsfMUHvWwtaBP
# Mn8tQvB6yJEbAZwmepZbxrkFAJQhE916qbQyZscbnEJvDiKwK6PagQ5NAVtBaiz5
# xN3ywPOw4kghRaRLMiOsq1q/9M/p9A==
# =hhAb
# -----END PGP SIGNATURE-----
# gpg: Signature made Thu 13 Nov 2025 11:53:00 PM CET
# gpg:                using RSA key 71C2CC22B1C4602927D2F3AAA7A16B4A2527436A
# gpg: Good signature from "Eric Blake <eblake@redhat.com>" [unknown]
# gpg:                 aka "Eric Blake (Free Software Programmer) <ebb9@byu.net>" [unknown]
# gpg:                 aka "[jpeg image of size 6874]" [unknown]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 71C2 CC22 B1C4 6029 27D2  F3AA A7A1 6B4A 2527 436A

* tag 'pull-nbd-2025-11-13' of https://repo.or.cz/qemu/ericb:
  tests/qemu-iotest: fix iotest 024 with qed images
  tests/qemu-iotests: Fix broken grep command in iotest 207
  iotests: Add coverage of recent NBD qio deadlock fix
  nbd: Avoid deadlock in client connecting to same-process server
  qio: Add QIONetListener API for using AioContext
  qio: Prepare NetListener to use AioContext
  qio: Provide accessor around QIONetListener->sioc
  chardev: Reuse channel's cached local address
  qio: Factor out helpers qio_net_listener_[un]watch
  qio: Minor optimization when callback function is unchanged
  qio: Protect NetListener callback with mutex
  qio: Remember context of qio_net_listener_set_client_func_full
  qio: Unwatch before notify in QIONetListener
  qio: Add trace points to net_listener
  iotests: Drop execute permissions on vvfat.out

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