[libmicrohttpd] Please update demo flags

[silvioprog]

Hello masters,

I noticed some flags was renamed on new MHD versions, so it would be nice to upgrade all examples (including commented sources) to using that new flags, for example (it seems all in red was renamed):

#if 0
  (void) MHD_add_response_header (response,
              MHD_HTTP_HEADER_CONNECTION,
              "close");
#endif
  d = MHD_start_daemon (MHD_USE_INTERNAL_POLLING_THREAD | MHD_USE_SUPPRESS_DATE_NO_CLOCK
#ifdef EPOLL_SUPPORT
         | MHD_USE_EPOLL | MHD_USE_TURBO
#endif

Thank you!

--

Silvio Clécio