uTasker: add note about XTIME to settings.h

src/internal.c

@@ -3355,7 +3355,7 @@ ProtocolVersion MakeDTLSv1_2(void)
 
     word32 LowResTimer(void)
     {
-		return (word32)(uTaskerSystemTick / TICK_RESOLUTION);
+        return (word32)(uTaskerSystemTick / TICK_RESOLUTION);
     }
 
 #elif defined(USER_TICKS)

wolfssl/wolfcrypt/settings.h

@@ -382,6 +382,13 @@
     #define CUSTOM_RAND_GENERATE    fnRandom
     #define CUSTOM_RAND_TYPE        unsigned short
 
+    /* user needs to define XTIME to function that provides
+     * seconds since Unix epoch */
+    #ifndef XTIME
+        #error XTIME must be defined in wolfSSL settings.h
+        /* #define XTIME fnSecondsSinceEpoch */
+    #endif
+
     /* use uTasker std library replacements where available */
     #define STRING_USER
     #define XMEMCPY(d,s,l)         uMemcpy((d),(s),(l))