OK with IPv4
{
	"authenticate_qualify": "no",
	"qualify_frequency": "30",
	"qualify_timeout": "5.000000",
	"user_agent": "JsSIP 0.3.0",
	"reg_server": "",
	"expiration_time": "1483193893",
	"call_id": "cm5lljk5ltrd6nm1r066k6",
	"via_addr": "192.0.2.168",
	"uri": "sip:hgujs53c@127.0.0.1:48889;transport=ws",
	"outbound_proxy": "",
	"path": "",
	"via_port": "0"
}

CRASH with SSL over Stunnel
{
	"reg_server": "",
	"qualify_timeout": "5.000000",
	"call_id": "jsfjiqhrfoaii9d965p0kt",
	"via_addr": "aqnl9pd7e03n.invalid",
	"outbound_proxy": "",
	"expiration_time": "1483195360",
	"endpoint": "1",
	"path": "",
	"uri": "sip:4mrc5sgs@[::1]:47322;transport=ws",
	"qualify_frequency": "30",
	"via_port": "0",
	"user_agent": "JsSIP 0.3.0",
	"authenticate_qualify": "no"
}

CRASH with direct WSS
{
	"qualify_frequency": "30",
	"qualify_timeout": "5.000000",
	"outbound_proxy": "",
	"expiration_time": "1483192335",
	"user_agent": "JsSIP 0.3.0",
	"path": "",
	"uri": "sip:mvi02rsb@[2002:5e72:8368:fc:1006:cd05:a4b:b00c]:51094;transport=wss"
}