Merge branch 'nginx' (nginx-1.9.15).

Change-Id: I3912801f1a80ff1cbdd9b233a62c6e9b2c782182
Signed-off-by: Piotr Sikora <piotrsikora@google.com>
tree: 6030407d1e807a95ef0a03dffeffdd2ffa3e1f91
  1. auto/
  2. conf/
  3. contrib/
  4. docs/
  5. misc/
  6. src/
  7. .hgtags
  8. BUILD
  9. LICENSE