Remove 4312 from the changelog.

Changes in version 0.2.3.9-alpha - 2011-1?-??

Changes in version 0.2.3.9-alpha - 2011-12-??

  o Major features:

    - When using OpenSSL 1.0.0 or later, use OpenSSL's counter mode

      implementation. It makes AES_CTR about 7% faster than our old one

      censorship by allowing bridges to use protocol obfuscation

      plugins. It implements the 'managed proxy' part of proposal

      180. Implements ticket 3472.

    - Block excess renegotiations even if they are RFC5746 compliant.

      This security fix mitigates potential SSL Denial of Service attacks

      that use SSL renegotiation as a way of forcing the server to perform

      unneeded computationally expensive SSL handshakes. Implements

      ticket 4312.

  o Major bugfixes:

    - Teach Tor how to notice excess renegotiation attempts before it

      receives the first data SSL record. Fixes part of ticket 4312.

    - Only use the EVP interface when AES acceleration is enabled,

      to avoid a 5-7% performance regression. Resolves issue 4525;

      bugfix on 0.2.3.8-alpha.