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Krzesimir Nowak authored
It simply starts a discovery, but now discovery was modified a bit, so every service that has replied to our discovery messages is put into map with responsive services. After a reasonable amount of time (here: 5 seconds), it looks for services that were cached, but haven't yet responded. Such services are removed from cache with notifying about them being unavailable beforehand. This was added so we can do a rescan for services that do not send an announcement messages when they appear or such messages may get lost in network.
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