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.

std::string GetArg(const std::string& strArg, const std::string& strDefault);
/**
 * Return integer argument or default value
 *
 * @param strArg Argument to get (e.g. "-foo")
 * @param default (e.g. 1)
 * @return command-line argument (0 if invalid number) or default value
 */
int64_t GetArg(const std::string& strArg, int64_t nDefault);
/**
 * Return boolean argument or default value
 *
 * @param strArg Argument to get (e.g. "-foo")
 * @param default (true or false)
 * @return command-line argument or default value
 */
bool GetBoolArg(const std::string& strArg, bool fDefault);
/**
 * Set an argument if it doesn't already have a value
 *
 * @param strArg Argument to set (e.g. "-foo")
 * @param strValue Value (e.g. "1")
 * @return true if argument gets set, false if it already had a value
 */
bool SoftSetArg(const std::string& strArg, const std::string& strValue);
/**
 * Set a boolean argument if it doesn't already have a value
 *
 * @param strArg Argument to set (e.g. "-foo")
 * @param fValue Value (e.g. false)