Disallow using -mineraddress and -clearnet=0 at the same time

src/init.cpp

@@ -1649,6 +1649,14 @@ bool AppInit2(boost::thread_group& threadGroup, CScheduler& scheduler)
 
     // Disable clearnet peers if -clearnet=0
     if (!GetBoolArg("-clearnet", DEFAULT_CLEARNET)) {
+#ifdef ENABLE_MINING
+        // mining to the same taddr links different txs together as from the same owner
+        // and if using -clearnet=0 that can be used to link together different .onions
+        // as being the same entity, because they are mining to the same taddr
+        if (mapArgs.count("-mineraddress")) {
+            return InitError(_("-mineraddress and -clearnet=0 cannot be used together because it would reduce your privacy!"));
+        }
+#endif
         SoftSetBoolArg("-disableipv4", true);
         SoftSetBoolArg("-disableipv6", true);
         SoftSetBoolArg("-dns", false);