[erlang-bugs] inets httpd server minor bug

[Dmitriy Kargapolov]

There is missing message/3 header in the httpd_util.erl, which should
handle 417 error code.
...
message(416,ReasonPhrase,_) ->
    html_encode(ReasonPhrase);

message(500,_,ConfigDB) ->
...

This code generated by handle_expect/2 in httpd_request_handler.erl
(lines 540-541):
...
        {break, Value} ->
            httpd_response:send_status(ModData, 417,
                                       "Unexpected expect value"),
...

This results in server crash when invalid Expect: header received.