Clear Node information in NetworkView

[nieznanysprawiciel]

Description:

• We never clear Nodes information in NetworkView structure. Memory usage will grow after longer yagna uptime.
• NetworkView in general should keep Node info as long as possible, because it serves the purpose of synchronization, when multiple Nodes are trying to initialize session with the same Node (but using many identities for example)
• When session is closed, we can have other tasks/threads trying to initialize this session again, so the synchronization is still necessary.
• NetworkView could be used to inform peers about Nodes that we know. So it could partially take over this responsibility from relay, when it is down

What:

• Find proper policy of removing information from NetworkView

[staszek-krotki]

This is done for sessions with servers, relayed connections are removed from the networkview