Add missing includes of stdio.h, and prefer |IN6ADDR_ANY_INIT| to |in6addr_any|. Change-Id: Ia6663ecd6f87008cb82979ef65620a55d8c9405b Reviewed-on: https://boringssl-review.googlesource.com/11626 Reviewed-by: David Benjamin <davidben@google.com> Commit-Queue: David Benjamin <davidben@google.com> CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>