Video Phone Peer - third-party notices

Video Phone Peer includes the software listed below. Each is distributed under its own license,
reproduced here as that license requires. None of these licenses restricts commercial use.

===============================================================================================
NAudio 2.2.1
  (NAudio, NAudio.Core, NAudio.Wasapi, NAudio.WinMM, NAudio.WinForms, NAudio.Midi, NAudio.Asio)
  https://github.com/naudio/NAudio
===============================================================================================

Copyright 2020 Mark Heath

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
associated documentation files (the "Software"), to deal in the Software without restriction,
including without limitation the rights to use, copy, modify, merge, publish, distribute,
sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or
substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT
OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

===============================================================================================
System.Security.Cryptography.ProtectedData 10.0.12
  https://github.com/dotnet/runtime
===============================================================================================

The MIT License (MIT)

Copyright (c) Microsoft Corporation. All rights reserved.

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
associated documentation files (the "Software"), to deal in the Software without restriction,
including without limitation the rights to use, copy, modify, merge, publish, distribute,
sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or
substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT
OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

===============================================================================================
Fluent UI System Icons
  (the app's icons, copied in as shapes)
  https://github.com/microsoft/fluentui-system-icons
===============================================================================================

MIT License

Copyright (c) 2020 Microsoft Corporation

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
associated documentation files (the "Software"), to deal in the Software without restriction,
including without limitation the rights to use, copy, modify, merge, publish, distribute,
sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or
substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT
OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

===============================================================================================
.NET and Windows Presentation Foundation
===============================================================================================

Video Phone Peer runs on the .NET runtime and WPF, both MIT licensed by Microsoft
(https://github.com/dotnet/runtime, https://github.com/dotnet/wpf). The downloads bundle the
runtime inside the app, so their licences and notices are included beside this file:

  DOTNET-LICENSE.txt               the .NET runtime's licence
  DOTNET-THIRD-PARTY-NOTICES.txt   the third-party software the .NET runtime itself includes
  WPF-LICENSE.txt                  Windows Presentation Foundation's licence

===============================================================================================
Services the app contacts
===============================================================================================

When a call starts, Video Phone Peer asks a STUN server what this machine's internet address is,
so the other end can reach it. The server used is Cloudflare's public STUN service
(stun.cloudflare.com). It sees the address of the machine asking, and nothing else: no account,
no names, and nothing said on the call.

It also contacts Video Phone Peer's own server, extramediumsoftwareco.com:

  - the rendezvous relay, which carries the setup of a call between two machines that cannot
    reach each other directly, and lets a group's owner be found by its invite code. It never
    carries the call itself. See the privacy policy for exactly what it holds, and for how long.
  - the update check, which reads one small file every few hours to see whether a newer version
    is out. It can be switched off in Settings, App.
  - the shop, once a product key is entered: to unlock this PC, and then at each start and once a
    day to check the key is still on it. See the privacy policy for what it sends and keeps.

The privacy policy is at https://extramediumsoftwareco.com/videophonepeer/privacy.html
