ii  libcurl3-gnutls:amd64               7.35.0-1ubuntu2.5                   amd64        easy-to-use client-side URL transfer library (GnuTLS flavour)
ii  libcurl4-gnutls-dev:amd64           7.35.0-1ubuntu2.5                   amd64        development files and documentation for libcurl (GnuTLS flavour)
ii  libgnutls-dev                       2.12.23-12ubuntu2.2                 amd64        GNU TLS library - development files
ii  libgnutls-openssl27:amd64           2.12.23-12ubuntu2.2                 amd64        GNU TLS library - OpenSSL wrapper
ii  libgnutls26:amd64                   2.12.23-12ubuntu2.2                 amd64        GNU TLS library - runtime library
ii  libgnutlsxx27:amd64                 2.12.23-12ubuntu2.2                 amd64        GNU TLS library - C++ runtime library