bug fix: error on long multibyte post

(twittering-start-http-ssl-session): add 'Expect: ' header field
for avoiding '417 Expectation Failed' HTTP response error. See
http://d.hatena.ne.jp/imait/20091228/1262004813 and
http://www.escafrace.co.jp/blog/09/10/16/1008

ChangeLog

@@ -1,6 +1,10 @@
 2009-12-29  Yuto Hayamizu  <y.hayamizu@gmail.com>
 
 	* twittering-mode.el: load mule-ucs if needed (emacs21)
+	(twittering-start-http-ssl-session): add 'Expect: ' header field
+	for avoiding '417 Expectation Failed' HTTP response error. See
+	http://d.hatena.ne.jp/imait/20091228/1262004813 and
+	http://www.escafrace.co.jp/blog/09/10/16/1008
 
 2009-12-28  Yuto Hayamizu  <y.hayamizu@gmail.com>
 

twittering-mode.el

@@ -630,6 +630,9 @@ Z70Br83gcfxaz2TE4JaY0KNA4gGK7ycH8WUBikQtBmV1UsCGECAhX2xrD2yuCRyv
   ;; TODO: use curl
   (let* ((request (twittering-make-http-request
 		   method headers host port path parameters))
+	 (headers (if (assoc "Expect" headers)
+		      headers
+		    (cons '("Expect" . "") headers)))
 	 (curl-args
 	  `("--include" "--silent"
 	    ,@(mapcan (lambda (pair)