Update the CA cert for compatibility.

Two certs in the CA bundle now:
- legacy for backwards compatibility with current (Nov 12, 2014)
  CloudFlare production environment
- new cert with 5 year expiration

Both certs have the same public key and thus the same SKI, however,
Client Auth checks the CN as well as the SKI, breaking compatibiilty
with certs signed by the legacy CA (unlike Server Auth that only checks
the SKI). Having both keeps compatibility for a CloudFlare upgrade.
Merge pull request #89 from cloudflare/nick/CA-compat

Update the CA cert for compatibility.