Clear m_addr_known before our periodic self-advertisement

This behavior was apparently inadvertently broken in 5400ef6; without this
change our daily self-announcements frequently go unsent, because our
address is still in the peer's rolling bloom filter (for potentially many
days, depending on addr traffic).

Author: sdaftuar

src/net_processing.cpp

@@ -4074,6 +4074,15 @@ bool PeerManager::SendMessages(CNode* pto)
         auto current_time = GetTime<std::chrono::microseconds>();
 
         if (pto->RelayAddrsWithConn() && !::ChainstateActive().IsInitialBlockDownload() && pto->m_next_local_addr_send < current_time) {
+            // If we've sent before, clear the bloom filter for the peer, so that our
+            // self-announcement will actually go out.
+            // This might be unnecessary if the bloom filter has already rolled
+            // over since our last self-announcement, but there is only a small
+            // bandwidth cost that we can incur by doing this (which happens
+            // once a day on average).
+            if (pto->m_next_local_addr_send != std::chrono::microseconds::zero()) {
+                pto->m_addr_known->reset();
+            }
             AdvertiseLocal(pto);
             pto->m_next_local_addr_send = PoissonNextSend(current_time, AVG_LOCAL_ADDRESS_BROADCAST_INTERVAL);
         }