Draft: RdpConnection: alternative for peer->Close, rename close to closeConnection

This is not a fully made solution yet, just start of something I tried.

If state is not running or streaming d->peer->Close will segfault.

We need our own handling for this part to avoid segfaults.

Alternatively, we shouldnt even close connection while its still starting, and hold the client connected until its done or something else fails.

I needed to also rename close to closeConnection, since it was overriding the close from <unistd.h>, so I couldn't close the socket manually.

From @ahiemstra

note that more importantly, the reason we are closing a connection while it's still starting is that at some point, PipeWire will start failing to create new streams