config client tuning
	option host 'mqtt.sibirsvarka.ru'
	option backup_addr '62.113.102.208'
	option port '443'
	option http_server 'mgmt-plasma.sibirsvarka.ru'
	option keepalive '60'
	# option cafile '/etc/ssl/certs/ResGroup_CA.crt'
	# option cert '/etc/ssl/certs/rg-pl-105.crt'
	# option key '/etc/ssl/private/rg-pl-105.key'
