Do not process tx inv's in blocksonly mode

src/main.cpp

@@ -4218,7 +4218,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
             bool fAlreadyHave = AlreadyHave(inv);
             LogPrint("net", "got inv: %s  %s peer=%d\n", inv.ToString(), fAlreadyHave ? "have" : "new", pfrom->id);
 
-            if (!fAlreadyHave && !fImporting && !fReindex && inv.type != MSG_BLOCK)
+            if (!fAlreadyHave && !fImporting && !fReindex && inv.type != MSG_BLOCK && !GetBoolArg("-blocksonly", false))
                 pfrom->AskFor(inv);
 
             if (inv.type == MSG_BLOCK) {