add NO_OLD_TIMEVAL_NAME macro for backwards compatibility

examples/server/server.c

@@ -81,7 +81,11 @@ int catastrophic = 0; /* Use with -x flag to still exit when an error is
 static int lng_index = 0;
 
 #ifdef WOLFSSL_CALLBACKS
-    WOLFSSL_TIMEVAL srvTo;
+    #if !defined(NO_OLD_TIMEVAL_NAME)
+        Timeval srvTo;
+    #else
+        WOLFSSL_TIMEVAL srvTo;
+    #endif
     static int srvHandShakeCB(HandShakeInfo* info)
     {
         (void)info;

wolfssl/callbacks.h

@@ -61,7 +61,9 @@ typedef struct handShakeInfo_st {
         long tv_usec; /* Microseconds. */
     } WOLFSSL_TIMEVAL;
 #endif /* HAVE_SYS_TIME_H */
-
+#if !defined(NO_OLD_TIMEVAL_NAME)
+    #define Timeval WOLFSSL_TIMEVAL
+#endif
 
 typedef struct packetInfo_st {
     char           packetName[MAX_PACKETNAME_SZ + 1]; /* SSL packet name */