OpenSSL: add support for the TLS padding extension.

This works around a bug in some versions of F5 devices that causes the
connection to hang when the ClientHello record is between 256 and 511 bytes
long.

https://tools.ietf.org/html/draft-agl-tls-padding-02

Based on the upstream patch to do the same thing:
0467ea68624450ecece4cde0d5803499aaff19c2

BUG=none

https://codereview.chromium.org/112933006


git-svn-id: http://src.chromium.org/svn/trunk/deps/third_party/openssl@243334 4ff67af0-8c30-449e-8e8b-ad334ec8d88c
8 files changed