fix sendq lock, use different mutexes for in,out.

lichao

2021-04-15 af86015d724e5edf001aa024fe7d8581c45cffd9

 src/bh_api.h

@@ -64,8 +64,7 @@

bool BHSendReply(BHSrcInfo *src,
                 const void *reply,
                 const int reply_len,
                 const int timeout_ms);
                 const int reply_len);

// int BHCleanUp();