Zabbix agent Auto-registration with secure communication

Scenario: Many CPE around the world in customers' datacentres
I need to autoregister all of them.. but I want to maintain encrypted communication with zabbix server
My solution is to introduce a new parameters "HostMetadataClear"
if this parameters is specified the 1st communication between client and server is in plain text, all sequent communications will be encrypted.
I attach the patch I used for.