display more srv attributes in output of ubus browse function

display more srv attributes in output of ubus browse function

In the output of ubus call umdns browse, the following srv params
have been exposed with this commit:

* domain,
* ttl,
* last_update,
* priority
* weight

The new output looks as follows:

"_http._tcp": {
	"Apache service": {
		"iface": "br-lan",
		"host": "user831.local",
		"domain": "local",
		"port": 80,
		"ttl": 120,
		"last_update": "2024-01-16T02:41:02Z",
		"priority": 0,
		"weight": 0,
		"ipv4": "192.168.1.245",
		"ipv6": "9999:1234:830::1f0",
		"ipv6":	"fdc5:c8b6:f412::1f0",
		"ipv6":	"fdc5:c8b6:f412:0:a800:aaff:fe53:101",
		"ipv6":	"9999:1234:830:0:a800:aaff:fe53:101"
	}
}

Signed-off-by: Mohd Husaam <husaam.mehdi@iopsys.eu>