Note that this package includes both 1.5.x and 2.x versions of the Cyrus SASL library. This is possible because they are (for the most part) installable in parallel [*]. At some future date, the 1.5.x support will be removed. New development should be targetted to the 2.0.x library, using header files in /usr/include/sasl, the libsasl2 library, and the /etc/sasldb2 sasldb. If you are upgrading from a system with Cyrus SASL 1.5.x installed, the dbconverter-2 tool can be used to extract secrets from an existing sasldb and store them in a sasldb2. * An exception is that the saslauthd protocols are different, so v1 clients can't use the included saslauthd for authentication.