Merge #15194: Add comment describing fDisconnect behavior

5b4283c Add comment describing fDisconnect behavior (Carl Dong)

Pull request description:

  Motivated by @Sjors here: bitcoin/bitcoin#14605 (comment)

Tree-SHA512: 8fc52eb4d3b5651c19c49b47fad75e8fb939cf524ada647e88d8d5aad7726052d94e500c1ebdb2a41b67bc4669ee61ff151a5cff81a52c68c900da562ef21751

Author: laanwj

src/net.h

@@ -689,6 +689,8 @@ class CNode
     bool m_limited_node{false}; //after BIP159, set by version message
     const bool fInbound;
     std::atomic_bool fSuccessfullyConnected{false};
+    // Setting fDisconnect to true will cause the node to be disconnected the
+    // next time DisconnectNodes() runs
     std::atomic_bool fDisconnect{false};
     // We use fRelayTxes for two purposes -
     // a) it allows us to not relay tx invs before receiving the peer's version message