Change TLSEXT_TYPE_padding to the IANA-assigned value 21.

R=agl@chromium.org,davidben@chromium.org,rsleevi@chromium.org
BUG=361311

Review URL: https://codereview.chromium.org/227553012

git-svn-id: http://src.chromium.org/svn/trunk/deps/third_party/openssl@262509 4ff67af0-8c30-449e-8e8b-ad334ec8d88c
4 files changed