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

 * Document 'password-secret' option for -iscsi
 * Deprecate iSCSI 'password' in favour of 'password-secret'
 * Remove deprecated 'password' option for SPICE
 * Fix handling of cached read buffers with TLS

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# gpg:                 aka "Daniel P. Berrange <berrange@redhat.com>" [full]
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* tag 'misc-next-pull-request' of https://gitlab.com/berrange/qemu:
  ui: remove deprecated 'password' option for SPICE
  block: deprecate iSCSI 'password' in favour of 'password-secret'
  block: mention 'password-secret' option for -iscsi
  io/channel-tls: fix handling of bigger read buffers
  crypto: TLS: introduce `check_pending`

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