Merge remote-tracking branch 'gkurz/tags/for-upstream' into staging

Merge remote-tracking branch 'gkurz/tags/for-upstream' into staging

This pull request fixes some leaks (memory, fd) in the handle and proxy
backends.

 # gpg: Signature made Wed 23 Nov 2016 12:53:41 PM GMT
 # gpg:                using DSA key 0x02FC3AEB0101DBC2
 # gpg: Good signature from "Greg Kurz <groug@kaod.org>"
 # gpg:                 aka "Greg Kurz <groug@free.fr>"
 # gpg:                 aka "Greg Kurz <gkurz@fr.ibm.com>"
 # gpg:                 aka "Greg Kurz <gkurz@linux.vnet.ibm.com>"
 # gpg:                 aka "Gregory Kurz (Groug) <groug@free.fr>"
 # gpg:                 aka "Gregory Kurz (Cimai Technology) <gkurz@cimai.com>"
 # gpg:                 aka "Gregory Kurz (Meiosys Technology) <gkurz@meiosys.com>"
 # 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: 2BD4 3B44 535E C0A7 9894  DBA2 02FC 3AEB 0101 DBC2

* gkurz/tags/for-upstream:
  9pfs: add cleanup operation for proxy backend driver
  9pfs: add cleanup operation for handle backend driver
  9pfs: add cleanup operation in FileOperations
  9pfs: adjust the order of resource cleanup in device unrealize

Message-id: 1479920298-24983-1-git-send-email-groug@kaod.org
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>