The variables "[fReopenDebugLog](https://github.com/bitcoin/bitcoin/blob/fa24439ff3d8ab5b9efaf66ef4dae6713b88cb35/src/util.h#L53)" and "[fRequestShutdown](https://github.com/bitcoin/bitcoin/blob/fae78fa81802b5387054715c339f286ef436408e/src/init.cpp#L128)" should [use the data type "sig_atomic_t"](https://www.securecoding.cert.org/confluence/display/c/SIG31-C.+Do+not+access+shared+objects+in+signal+handlers) (instead of "bool").

I reported this issue for [another evolving software](https://github.com/Electric-Coin-Company/zcash/issues/678) before.

{
    boost::filesystem::path pathConfigFile(GetArg("-conf", BITCOIN_CONF_FILENAME));
    if (!pathConfigFile.is_complete())
        pathConfigFile = GetDataDir(false) / pathConfigFile;
    return pathConfigFile;
}
void ReadConfigFile(map<string, string>& mapSettingsRet,
                    map<string, vector<string> >& mapMultiSettingsRet)
{
    boost::filesystem::ifstream streamConfig(GetConfigFile());
    if (!streamConfig.good())
        return; 
    set<string> setOptions;
    setOptions.insert("*");
    for (boost::program_options::detail::config_file_iterator it(streamConfig, setOptions), end; it != end; ++it)
    {
        
        string strKey = string("-") + it->string_key;
        string strValue = it->value[0];
        InterpretNegativeSetting(strKey, strValue);
        if (mapSettingsRet.count(strKey) == 0)
            mapSettingsRet[strKey] = strValue;
        mapMultiSettingsRet[strKey].push_back(strValue);
    }
    
    ClearDatadirCache();
}
#ifndef WIN32
boost::filesystem::path GetPidFile()