Merge 212122 "net: allow fallback down to TLS 1.0 in the event o..."

Merge 212122 "net: allow fallback down to TLS 1.0 in the event o..."

> net: allow fallback down to TLS 1.0 in the event of a bad-record-MAC alert.
> 
> TLS 1.1 support has uncovered several examples of a new kind of broken server:
> they negotiate TLS 1.0 correctly in the face of a 1.1 or 1.2 ClientHello, but
> then fail with a bad-record-MAC alert when processing the client's Finished
> message.
> 
> This bug is exhibited by at least two different types of SSL "accelerator"
> device, which will probably take forever to be fixed. So, with a heavy heart,
> this change adds yet another workaround.
> 
> BUG=260358
> R=rsleevi@chromium.org
> 
> Review URL: https://codereview.chromium.org/19607008

TBR=agl@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=213136

[agl, 2013-07-23 16:17:01]

Committed patchset #1 manually as r213136.