Asan: Try to fix st_memory_leak for asan check (ossrs#3264)

* asan: try to fix st_memory_leak for asan check

* asan: srs_st_unit should be call in hybrid server stop

* Rename st_uninit to st_destroy. v5.0.91

Co-authored-by: winlin <winlin@vip.126.com>

trunk/src/app/srs_app_hybrid.cpp

@@ -232,6 +232,8 @@ void SrsHybridServer::stop()
         ISrsHybridServer* server = *it;
         server->stop();
     }
+
+    srs_st_destroy();
 }
 
 SrsServerAdapter* SrsHybridServer::srs()

trunk/src/protocol/srs_protocol_st.cpp

@@ -70,6 +70,11 @@ srs_error_t srs_st_init()
     return srs_success;
 }
 
+void srs_st_destroy(void)
+{
+    st_destroy();
+}
+
 void srs_close_stfd(srs_netfd_t& stfd)
 {
     if (stfd) {

trunk/src/protocol/srs_protocol_st.hpp

@@ -19,8 +19,10 @@ typedef void* srs_thread_t;
 typedef void* srs_cond_t;
 typedef void* srs_mutex_t;
 
-// Initialize st, requires epoll.
+// Initialize ST, requires epoll for linux.
 extern srs_error_t srs_st_init();
+// Destroy ST, free resources for asan detecting.
+extern void srs_st_destroy(void);
 
 // Close the netfd, and close the underlayer fd.
 // @remark when close, user must ensure io completed.