Close connection on EOF

this makes downloading some asx files from MS
streaming servers work again (they would hang on eos).
The http request header property connection:close is needed for _some_
1.1 HTTP servers to close the connection at the end of file.
patch by Ronald S. Bultje % rbultje A ronald P bitfreak P net%
Original thread:
Date: Mar 3, 2007 10:48 PM
Subject: [Ffmpeg-devel] [PATCH] close connection on end-of-file

Originally committed as revision 8221 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/http.c

@@ -221,6 +221,7 @@ static int http_connect(URLContext *h, const char *path, const char *hoststr,
              "Range: bytes=%"PRId64"-\r\n"
              "Host: %s\r\n"
              "Authorization: Basic %s\r\n"
+             "Connection: close\r\n"
              "\r\n",
              post ? "POST" : "GET",
              path,