For every peer expose through `getpeerinfo` RPC whether or not we selected them as HB peers, and whether or not they selected us as HB peers.

Suggestion by @gmaxwell.
*     tip did when the timeout was set, then send a getheaders message,
      *     and set a shorter timeout, HEADERS_RESPONSE_TIME seconds in future.
      *     If their best known block is still behind when that new timeout is
      *     reached, disconnect.
      *
      * EXTRA_PEER_CHECK_INTERVAL: after each interval, if we have too many outbound peers,
      * drop the outbound one that least recently announced us a new block.
      */
    struct ChainSyncTimeoutState {
        
        int64_t m_timeout;
        
        const CBlockIndex * m_work_header;
        
        bool m_sent_getheaders;
        
        bool m_protect;
    };
    ChainSyncTimeoutState m_chain_sync;
    
    int64_t m_last_block_announcement;
    
    bool m_is_inbound;
    
    bool m_is_manual_connection;
    
    CRollingBloomFilter m_recently_announced_invs = CRollingBloomFilter{INVENTORY_MAX_RECENT_RELAY, 0.000001};
    
    bool m_wtxid_relay{false};
    CNodeState(CAddress addrIn, bool is_inbound, bool is_manual)