tcp server call center to send proxy requests.

lichao

2021-05-27 026bbfaf2b5d73a26b8e2fa49158883ef64c211b

 src/bh_api.h

@@ -44,6 +44,14 @@
                        int *reply_len,
                        const int timeout_ms);

int BHQueryProcs(const void *remote,
                 const int remote_len,
                 const void *query,
                 const int query_len,
                 void **reply,
                 int *reply_len,
                 const int timeout_ms);

int BHSubscribeTopics(const void *topics,
                      const int topics_len,
                      void **reply,