When downloading and running Bitcoin core for the first time, after clicking through the "Are you sure you want to open. it?" screen, there's a possibility that macOS will pass an argument like `-psn_0_SOME_ID` to the application, which results in a shutdown as it's an invalid argument:

![v0 19 0rc1 args shutdown](https://user-images.githubusercontent.com/863730/67034964-b026fc00-f0e6-11e9-8462-70d0fcf613e6.png)

This only happens on the first run, subsequent opens will work fine, but we should filter these out, otherwise it's a poor and confusing first experience.

{
    WCHAR pszPath[MAX_PATH] = L"";
    if(SHGetSpecialFolderPathW(nullptr, pszPath, nFolder, fCreate))
    {
        return fs::path(pszPath);
    }
    LogPrintf("SHGetSpecialFolderPathW() failed, could not obtain requested path.\n");
    return fs::path("");
}
#endif
#if HAVE_SYSTEM
void runCommand(const std::string& strCommand)
{
    if (strCommand.empty()) return;
#ifndef WIN32
    int nErr = ::system(strCommand.c_str());
#else
    int nErr = ::_wsystem(std::wstring_convert<std::codecvt_utf8_utf16<wchar_t>,wchar_t>().from_bytes(strCommand).c_str());
#endif
    if (nErr)
        LogPrintf("runCommand error: system(%s) returned %d\n", strCommand, nErr);
}
#endif
void SetupEnvironment()
{
#ifdef HAVE_MALLOPT_ARENA_MAX