Zabbix

 - added #include <time.h> into db.h (Alexei)
 - added support for connection to MySQL via Unix socket (Alexei)
 - configure to find PostgreSQL in /usr/local/lib and
/usr/local/include/pgsql (Alexei)
 - added set of user-defined parameters for monitoring MySQL
servers. See misc/conf/zabbix_agent(d).conf (Alexei)