Zabbix

.......... [DEV-4147] updated to latest master, fixed conflicts in include/zbxasyncpoller.h, src/libs/zbxasyncpoller/asyncpoller.c, src/libs/zbxdiscoverer/async_http.c, src/libs/zbxdiscoverer/async_telnet.c, src/libs/zbxpoller/async_agent.c, src/libs/zbxpoller/checks_snmp.c