[libsrtp] libSRTP version 2.6.0 has been released

For more details please see the CHANGES file or got to https://github.com/cisco/libsrtp/releases/tag/v2.6.0 The following links are available for downloading: https://github.com/cisco/libsrtp/archive/v2.6.0.tar.gz https://github.com/cisco/libsrtp/archive/v2.6.tar.gz https://github.com/cisco/libsrtp/archive/v2.tar.gz Thank you to everybody that has contributed. Work as started in libSRTP v3, more details can be found at https://github.com/cisco/libsrtp/issues/669 . libSRTP team.