Zabbix

.......... [ZBXNEXT-4731] merged from latest trunk; resolved conflicts in:

 - create/src/schema.tmpl
 - frontends/php/include/classes/api/services/CHostGeneral.php
 - frontends/php/include/defines.inc.php
 - frontends/php/items.php
 - include/dbcache.h
 - src/libs/zbxdbupgrade/dbupgrade_4010.c
 - src/zabbix_server/events.c