Implement SSDP Metadata export

[koltiradw]

Please sign (check) the below before submitting the Pull Request:

• I have signed the ntop Contributor License Agreement at https://github.com/ntop/legal/blob/main/individual-contributor-licence-agreement.md
• I have read the contributing guidelines at https://github.com/ntop/nDPI/blob/dev/CONTRIBUTING.md
• I have updated the documentation (in doc/) to reflect the changes made (if applicable)

Link to the related issue:

Describe changes:

 {
    "CACHE-CONTROL":"max-age = 1800",
    "LOCATION":"http:\/\/192.168.1.173:1400\/xml\/device_description.xml",
    "NT":"urn:schemas-upnp-org:service:ZoneGroupTopology:1",
    "NTS":"ssdp:alive",
    "SERVER":"Linux UPnP\/1.0 Sonos\/80.1-55240 (ZPS21)",
    "USN":"uuid:RINCON_347E5CFFA26E01400::urn:schemas-upnp-org:service:ZoneGroupTopology:1",
    "X-RINCON-HOUSEHOLD":"Sonos_comcARdqLpz2IYb0DFQfG4gz5r",
    "X-RINCON-BOOTSEQ":"1946",
    "BOOTID.UPNP.ORG":"1946",
    "X-RINCON-WIFIMODE":"0",
    "X-RINCON-VARIANT":"0",
    "HOUSEHOLD.SMARTSPEAKER.AUDIO":"Sonos_comcARdqLpz2IYb0DFQfG4gz5r.tQvIgf8-QhzKPQkRQVaI",
    "LOCATION.SMARTSPEAKER.AUDIO":"lc_63a3900f003f428f98c2091f5216db82",
    "SECURELOCATION.UPNP.ORG":"https:\/\/192.168.1.173:1443\/xml\/device_description.xml",
    "X-SONOS-HHSECURELOCATION":"https:\/\/192.168.1.173:1843\/xml\/device_description.xml"
}

[IvanNardi]

@koltiradw, interesting work!
Any chance you can share a pcap with some of these new fields?

[koltiradw]

I took a pcap from #2524

[IvanNardi]

I added the pcap and I will merge this PR when the CI ends.
Thank you very much

[koltiradw]

@IvanNardi
I also want to add a method field: NOTIFY or M-SEARCH.

[IvanNardi]

@IvanNardi I also want to add a method field

Ok, go ahead. Let me know when the PR is ready to merge

[koltiradw]

@IvanNardi, rdy!

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[IvanNardi]

LGTM, thanks!