[boost] [trac] SSL certificate revoked?

Hi, I'm getting an error while trying to open an existing Trac ticket: https://svn.boost.org/trac/boost/ticket/11798 Secure Connection Failed An error occurred during a connection to svn.boost.org. Peer’s Certificate has been revoked. Error code: SEC_ERROR_REVOKED_CERTIFICATE Is this a known problem? Firefox 51.0.1.