Merge tag 'pull-nbd-2023-10-05' of https://repo.or.cz/qemu/ericb into staging

NBD patches for 2023-10-05

- various: mailmap cleanups
- Eric Blake: enable use of NBD 64-bit extended headers

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# gpg: Signature made Thu 05 Oct 2023 14:43:42 EDT
# gpg:                using RSA key 71C2CC22B1C4602927D2F3AAA7A16B4A2527436A
# gpg: Good signature from "Eric Blake <eblake@redhat.com>" [full]
# gpg:                 aka "Eric Blake (Free Software Programmer) <ebb9@byu.net>" [full]
# gpg:                 aka "[jpeg image of size 6874]" [full]
# Primary key fingerprint: 71C2 CC22 B1C4 6029 27D2  F3AA A7A1 6B4A 2527 436A

* tag 'pull-nbd-2023-10-05' of https://repo.or.cz/qemu/ericb:
  nbd/server: Add FLAG_PAYLOAD support to CMD_BLOCK_STATUS
  nbd/server: Prepare for per-request filtering of BLOCK_STATUS
  nbd/server: Refactor list of negotiated meta contexts
  nbd/client: Request extended headers during negotiation
  nbd/client: Accept 64-bit block status chunks
  nbd/client: Initial support for extended headers
  nbd/client: Plumb errp through nbd_receive_replies
  nbd/server: Enable initial support for extended headers
  nbd/server: Support 64-bit block status
  nbd/server: Prepare to send extended header replies
  nbd/server: Prepare to receive extended header requests
  nbd/server: Support a request payload
  mailmap: Fix BALATON Zoltan author email
  maint: Tweak comments in mailmap regarding SPF
  mailmap: Fix Andrey Drobyshev author email

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