Do not call ResendWalletTransactions when reindexing, importing or on IBD

Calling ResendWalletTransactions when reindexing, importing or on IBD spams
other nodes with our old transactions, because they become unconfirmed.

src/main.cpp

@@ -3812,7 +3812,12 @@ bool SendMessages(CNode* pto, bool fSendTrickle)
         }
 
         // Resend wallet transactions that haven't gotten in a block yet
-        ResendWalletTransactions();
+        // Except during reindex, importing and IBD, when old wallet
+        // transactions become unconfirmed and spams other nodes.
+        if (!fReindex && !fImporting && !IsInitialBlockDownload())
+        {
+            ResendWalletTransactions();
+        }
 
         // Address refresh broadcast
         static int64 nLastRebroadcast;