Drop broker::peer_flags?

[Neverlord]

While working on #309, I've noticed this little enum lying around in the code base:

enum class peer_flags : int {
  invalid = 0x00,
  local = 0x01,
  remote = 0x02,
  outbound = 0x04,
  inbound = 0x08,
};

It seems like nothing ever uses this. endpoint::peers() returns a list of peer_info objects, that technically contains this information:

/// Information about a peer of an endpoint.
/// @relates endpoint
struct peer_info {
  endpoint_info peer; ///< Information about the peer.
  peer_flags flags;   ///< Details about peering relationship.
  peer_status status; ///< The current peering status.
};

However, I found nothing that ever reads the flags member with the only exception being the Python bindings for exposing them to Python users.

Moreover, the enum values strike me as a leftover of previous Broker design iterations. There's no such thing as "local", "inbound" or "outbound" peerings. The only distinction we could make at the moment is for native vs WebSocket peers. Even for those, I wouldn't re-purpose the enum type, though. If we were to extend peer_info, I think we should go beyond a simple enum. If we wanted to expose native/WebSocket distinction, I think we should also pass additional information like client URI/version/etc.

Do I miss something or can we get rid of this as well when removing the Python module?

[Neverlord]

I'll postpone this until we get rid of the Python bindings.