D: Downloading from this peer
d: We would download from this peer if they would let us
E: Encrypted connection
H: Peer was found through DHT
I: Peer is an incoming connection
K: Peer has unchoked us, but we're not interested
O: Optimistic unchoked
T: Peer is connected over uTP
U: Uploading to peer
u: We would upload to this peer if they asked
X: Peer was discovered through Peer Exchange (PEX)
?: We unchoked this peer, but they're not interested