Revert "Updated against upstream v2.5.5"
This reverts commit c211c49b48c24d81af3ffe89dbd77aa5a44c0258.
The latest v2.5.5 depends on an OpenSSL version with TLSv1.1 and
TLSv1.2 support. EL6 does not provide that. So for now,
reverting the update to v2.5.5.