change busy_rc to busy_msg

Author: chronolaw

src/ngx_http_lua_socket_tcp.c

@@ -1569,7 +1569,7 @@ ngx_http_lua_ffi_socket_tcp_sslhandshake(ngx_http_request_t *r,
     ngx_connection_t        *c;
     ngx_http_lua_ctx_t      *ctx;
     ngx_http_lua_co_ctx_t   *coctx;
-    const char              *busy_rc;
+    const char              *busy_msg;
     ngx_ssl_conn_t          *ssl_conn;
     X509                    *x509;
 
@@ -1590,11 +1590,11 @@ ngx_http_lua_ffi_socket_tcp_sslhandshake(ngx_http_request_t *r,
         return NGX_ERROR;
     }
 
-    busy_rc = ngx_http_lua_socket_tcp_check_busy(r, u, SOCKET_OP_CONNECT
+    busy_msg = ngx_http_lua_socket_tcp_check_busy(r, u, SOCKET_OP_CONNECT
                                                  | SOCKET_OP_READ
                                                  | SOCKET_OP_WRITE);
-    if (busy_rc != NULL) {
-        *errmsg = busy_rc;
+    if (busy_msg != NULL) {
+        *errmsg = busy_msg;
         return NGX_ERROR;
     }