/usr/include/ is in libresiprocate-turn-client-1.10-dev 1:1.10.1-2ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/reTurn/
/usr/include/reTurn/TurnAllocationManager.hxx
/usr/include/reTurn/TurnManager.hxx
/usr/include/reTurn/AsyncTlsSocketBase.hxx
/usr/include/reTurn/TcpConnection.hxx
/usr/include/reTurn/UdpRelayServer.hxx
/usr/include/reTurn/ChannelManager.hxx
/usr/include/reTurn/DataBuffer.hxx
/usr/include/reTurn/StunTuple.hxx
/usr/include/reTurn/reTurnServer.hxx
/usr/include/reTurn/AsyncSocketBaseHandler.hxx
/usr/include/reTurn/ReTurnSubsystem.hxx
/usr/include/reTurn/RequestHandler.hxx
/usr/include/reTurn/AsyncUdpSocketBase.hxx
/usr/include/reTurn/AsyncTcpSocketBase.hxx
/usr/include/reTurn/ConnectionManager.hxx
/usr/include/reTurn/TurnPermission.hxx
/usr/include/reTurn/TlsConnection.hxx
/usr/include/reTurn/TurnAllocationKey.hxx
/usr/include/reTurn/TurnAllocation.hxx
/usr/include/reTurn/UserAuthData.hxx
/usr/include/reTurn/AsyncSocketBase.hxx
/usr/include/reTurn/client/
/usr/include/reTurn/client/TurnTcpSocket.hxx
/usr/include/reTurn/client/TurnAsyncSocket.hxx
/usr/include/reTurn/client/TurnAsyncUdpSocket.hxx
/usr/include/reTurn/client/TurnAsyncTcpSocket.hxx
/usr/include/reTurn/client/TurnAsyncSocketHandler.hxx
/usr/include/reTurn/client/TurnUdpSocket.hxx
/usr/include/reTurn/client/TurnSocket.hxx
/usr/include/reTurn/client/ErrorCode.hxx
/usr/include/reTurn/client/TurnAsyncTlsSocket.hxx
/usr/include/reTurn/client/TurnTlsSocket.hxx
/usr/include/reTurn/TcpServer.hxx
/usr/include/reTurn/ReTurnConfig.hxx
/usr/include/reTurn/TlsServer.hxx
/usr/include/reTurn/StunMessage.hxx
/usr/include/reTurn/RemotePeer.hxx
/usr/include/reTurn/UdpServer.hxx
/usr/include/reTurn/StunAuth.hxx