* `Ouroboros.Network.Subscription` removed;
* `Ouroboros.Network.ErrorPolicy` removed;
* APIs removed from `Ouroboros.Network.Socket`:
  * `NetworkMutableState` & friends,
  * `withServerNode` and `withServerNode'`,
  * `NetworkServerTracers`,
  * `fromSnocket`,
  * `beginConnection`
* `Ouroboros.Network.Server.Socket` replaced with a simpler server
  implementation in `Test.Ouroboros.Network.Server`.

All tests & demos of `ouroboros-network-framework` update.

* Updated to compile with changes in the previous commit.
* APIs removed from `Ouroboros.Network.{NodeToClient,NodeToNode}` modules:
  * NetworkServerTracers
  * NetworkMutableState APIs
  * withServer
  * ErrorPolicies
  * WithAddr
  * SuspendDecision
* APIs removed from `Ouroboros.Network.NodeToNode` module:
  * IPSubscriptionTarget
  * NetworkIPSubscription
  * NetworkSubscriptionTracers
  * SubscriptionParams
  * DnsSubscriptionTarget
  * DnsSubscriptioinParams
  * NetworkDNSSubscriptionTracers
  * dnsSubscriptionWorker

Instead of writing `PublicPeerSelectionState` on each outbound governor
loop iteration, provide a request-response API through a `StrictTMVar` which
is monitored by the outbound governor.

Note that `PublicPeerSelectionState` is a lazy record written through
`StrictTMVar` via a lazy `Maybe` like type (and thus it is not evaluated
to WHNF when written to the shared variable).  It is up to the API user to
evaluate what it needs.

It includes data from connection-manager and outbound/inbound governors.

…aring.Codec module

The `Ouroboros.Network.RemoteAddress.Codec` seems like a better place
for it, since its not only `peer-sharing` related.