[sheepdog] [PATCH stable-0.7] update for rb_destroy() helper

[Hitoshi Mitake]

This update backports a patch which implements a helper rb_destroy(). It is
required by zookeeper driver.

This update contains manual modification for backporting. If no one disagrees
in 2 days or a maintainer agrees, this update will be pushed to stable-0.7.

Liu Yuan (1):
  rbtree: add rb_destroy helper

 include/rbtree.h |  113 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 113 insertions(+)

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1.7.10.4