partial bitcoin#25176: Fix frequent -netinfo JSON errors from null ge…

…tpeerinfo#relaytxes

excludes:
- a17c5e9

src/bitcoin-cli.cpp

@@ -487,7 +487,7 @@ class NetinfoRequestHandler : public BaseRequestHandler
             if (network_id == UNKNOWN_NETWORK) continue;
             m_is_i2p_on |= (network_id == NET_I2P);
             const bool is_outbound{!peer["inbound"].get_bool()};
-            const bool is_block_relay{!peer["relaytxes"].get_bool()};
+            const bool is_block_relay{peer["relaytxes"].isNull() ? false : !peer["relaytxes"].get_bool()};
             const std::string conn_type{peer["connection_type"].get_str()};
             ++m_counts.at(is_outbound).at(network_id);      // in/out by network
             ++m_counts.at(is_outbound).at(m_networks_size); // in/out overall