parse dst, src and rename proto to protocol

[jsirianni]

• parse dst into ip, port, interface
• parse src into ip, port, interface
• rename proto to protocol

{
  "timestamp": "2021-09-13T18:16:13Z",
  "severity": 30,
  "severity_text": "134",
  "labels": {
    "log_type": "sonicwall",
    "net.host.ip": "::",
    "net.host.port": "5555",
    "net.peer.ip": "::1",
    "net.peer.port": "36748",
    "net.transport": "IP.UDP",
    "plugin_id": "sonicwall"
  },
  "record": {
    "c": "262144",
    "dst_interface": "X1",
    "dst_ip": "142.250.64.68",
    "dst_port": "443",
    "fw": "142.166.177.10",
    "gcat": "6",
    "id": "LVM_Sonicwall",
    "m": "98",
    "message": "Connection Opened",
    "n": "53798",
    "natDst": "142.250.64.68:443",
    "natSrc": "142.166.177.10:51879",
    "pri": "6",
    "priority": "134",
    "protocol": "tcp/https",
    "sent": "60",
    "sn": "18B1693B2C90",
    "src_interface": "X0",
    "src_ip": "192.168.11.53",
    "src_port": "36510"
  }
}