Starting with txindex option produces a bug continually printing "y".

```
sudo apt-add-repository ppa:bitcoin/bitcoin
sudo apt-get update
bitcoind -daemon -txindex=1 -server=1 &
root@btc:~# Bitcoin server starting
: You need to rebuild the database using -reindex to change -txindex.

Do you want to rebuild the block database now?
yes
y
y
y
y
y
```

{
    const std::string URL_SOURCE_CODE = "<https:github.com/bitcoin/bitcoin>";
    const std::string URL_WEBSITE = "<https:bitcoincore.org>";
    
    return CopyrightHolders(strprintf(_("Copyright (C) %i-%i"), 2009, COPYRIGHT_YEAR) + " ") + "\n" +
           "\n" +
           strprintf(_("Please contribute if you find %s useful. "
                       "Visit %s for further information about the software."),
               PACKAGE_NAME, URL_WEBSITE) +
           "\n" +
           strprintf(_("The source code is available from %s."),
               URL_SOURCE_CODE) +
           "\n" +
           "\n" +
           _("This is experimental software.") + "\n" +
           _("Distributed under the MIT software license, see the accompanying file COPYING or <http:www.opensource.org/licenses/mit-license.php>.") + "\n" +
           "\n" +
           _("This product includes software developed by the OpenSSL Project for use in the OpenSSL Toolkit <https:www.openssl.org/> and cryptographic software written by Eric Young and UPnP software written by Thomas Bernard.") +
           "\n";
}
static void BlockNotifyCallback(bool initialSync, const CBlockIndex *pBlockIndex)