[core] remove fd interest if create_env returns
[core] remove fd interest if create_env returns

remove fd interest in FDEVENT_OUT to backend if create_env hook returns
a status that is not HANDLER_GO_ON, HANDLER_FINISHED, or HANDLER_ERROR
(e.g. HANDLER_WAIT_FOR_EVENT or HANDLER_WAIT_FOR_FD or HANDLER_COMEBACK)

lighttpd/lighttpd1.4,lighttpd/lighttpd1.4,gstrauss/lighttpd1.4,gstrauss/lighttpd1.4,gstrauss/lighttpd1.4,gstrauss/lighttpd1.4,gstrauss/lighttpd1.4,lighttpd/lighttpd1.4,gstrauss/lighttpd1.4,lighttpd/lighttpd1.4,lighttpd/lighttpd1.4,lighttpd/lighttpd1.4