MHD_connection_epoll_update_(): updated and simplified conditions required to move connection back to epoll monitoring.
MHD_connection_epoll_update_(): updated and simplified conditions required
to move connection back to epoll monitoring.

ghaderer/libmicrohttpd,maru/libmicrohttpd-http2,ghaderer/libmicrohttpd,maru/libmicrohttpd-http2,ghaderer/libmicrohttpd,maru/libmicrohttpd-http2