Identity conflict: verify connection is usable#153
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Possible fix for behavior indicated in #152 concerning identify conflicts.
As identity is generated using socket ports there should not be any conflict for active connections. However, if a socket is closed but not properly unregistered from the listener this may occur.
I haven't found out what can cause closed sockets to remain registered. This PR rather adds a safeguard, checking if socket is readable and removes the previously registered if closed, so the conflict no longer occur.
Closing #152