Clear ZBX, DB env variables before starting agent, server, proxy and web-service

Dockerfiles/proxy-sqlite3/centos/docker-entrypoint.sh

@@ -259,10 +259,19 @@ update_zbx_config() {
     update_config_var $ZBX_CONFIG "StartBrowserPollers" "${ZBX_STARTBROWSERPOLLERS}"
 }
 
+clear_zbx_env() {
+    [[ "${ZBX_CLEAR_ENV}" == "false" ]] && return
+
+    for env_var in $(env | grep -E "^ZBX_"); do
+        unset "${env_var%%=*}"
+    done
+}
+
 prepare_proxy() {
     echo "Preparing Zabbix proxy"
 
     update_zbx_config
+    clear_zbx_env
 }
 
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