Merge tag 'linux-user-next-pull-request' of https://github.com/hdeller/qemu-hppa...

Pull request for linux-user

Please pull 4 fixes for the linux-user target.
Two patches fix open bug reports regarding return error codes and allowed parameters.
One adds missing CDROM ioctls (and fixes a few), and the last patch is a leftover
from the previous pull request and helps flushing error strings at exit.

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# gpg:                using EDDSA key BCE9123E1AD29F07C049BBDEF712B510A23A0F5F
# gpg: Good signature from "Helge Deller <deller@gmx.de>" [unknown]
# gpg:                 aka "Helge Deller <deller@kernel.org>" [unknown]
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* tag 'linux-user-next-pull-request' of https://github.com/hdeller/qemu-hppa:
  linux-user: Translate errno in IP_RECVERR and IPV6_RECVERR
  linux-user: Allow getsockopt() with NULL optval address
  linux-user: Flush errors by using exit() instead of _exit() in error path
  linux-user: Add missing CDROM ioctls

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