On replacing a client with another, clear the stale association.
Also check both associations for timeout, not just the incoming one.

Also removed client_in_list(): static & unused.
Wrapping: Expanded space of output to be a bit larger than input. Basic wrap(): Embed continuation markers if there's enough space.
Merge pull request #649 from FullName/DHT-client_id-change-wipe-other-address

On replacing a client with another, clear the stale association.
Merge pull request #651 from FullName/ntox-wrap-basic-with-continuation

Basic wrap(): Embed continuation markers if there's enough space.
Send our name when someone new joins the group chat.
Fixed build error on windows.
Tolerate instable connectivity: if *all* set close nodes are in terminal timeout (KILL_NODE_TIMEOUT), reset them all to BAD_NODE_TIMEOUT.
That keeps the client trying to at least ping the nodes in the hopes of the connection coming back up.
Fixed segfault.
Merge pull request #652 from FullName/reset_on_long_timeout

Tolerate instable connectivity.