Note that this package includes both 1.5.x and 2.0.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.