small header updates, added missing date and maybe fix FF playback issue

after a report came in about FF playback, it seems that the accept-ranges header may be
causing some issue.  We don't need it and I'm not aware of anyone actually requiring it
so remove that for now.

Added Date header just to keep to standard, and only return 1.1 if the request was 1.1

src/format.c

@@ -281,7 +281,8 @@ int format_general_headers (format_plugin_t *plugin, client_t *client)
     if (client->respcode == 0)
     {
         const char *useragent = httpp_getvar (client->parser, "user-agent");
-        const char *protocol = (client->flags & CLIENT_KEEPALIVE) ?  "HTTP/1.1" : "HTTP/1.0";
+        const char *ver = httpp_getvar (client->parser, HTTPP_VAR_VERSION);
+        const char *protocol;
         const char *contenttypehdr = "Content-Type";
         const char *contenttype = plugin->contenttype;
         const char *fs = httpp_getvar (client->parser, "__FILESIZE");
@@ -294,6 +295,10 @@ int format_general_headers (format_plugin_t *plugin, client_t *client)
 
         do
         {
+            if (ver && strcmp (ver, "1.1") == 0)
+                protocol = "HTTP/1.1";
+            else
+                protocol = "HTTP/1.0";
             if (opt)
             {
                 fmtcode = atoi (opt);
@@ -389,35 +394,40 @@ int format_general_headers (format_plugin_t *plugin, client_t *client)
         }
         if (client->respcode == 0)
         {
+            char datebuf [100] = "\0";
+            struct tm result;
+
+            if (gmtime_r (&client->worker->current_time.tv_sec, &result))
+                strftime (datebuf, sizeof(datebuf), "Date: %a, %d %b %Y %X GMT\r\n", &result);
+
             if (contenttype == NULL)
                 contenttype = "application/octet-stream";
             if (length)
             {
                 client->respcode = 200;
                 bytes = snprintf (ptr, remaining, "%s 200 OK\r\n"
                         "Content-Length: %" PRIu64 "\r\n"
-                        "%s: %s\r\n", protocol, length, contenttypehdr, contenttype);
+                        "%s: %s\r\n%s", protocol, length, contenttypehdr, contenttype, datebuf);
             }
             else
             {
-                int chunked = 0; // (ver == NULL || strcmp (ver, "1.0") == 0) ? 0 : 1;
+                int chunked = 0;
                 const char *TE = "";
 
                 if (plugin && plugin->flags & FORMAT_FL_ALLOW_HTTPCHUNKED)
                 {
-                    const char *ver = httpp_getvar (client->parser, HTTPP_VAR_VERSION);
                     chunked = (ver == NULL || strcmp (ver, "1.0") == 0) ? 0 : 1;
                 }
                 if (chunked && (fmtcode & FMT_DISABLE_CHUNKED) == 0)
                 {
                     client->flags |= CLIENT_CHUNKED;
                     TE = "Transfer-Encoding: chunked\r\n";
-                    protocol = "HTTP/1.1";
                 }
                 client->flags &= ~CLIENT_KEEPALIVE;
                 client->respcode = 200;
-                bytes = snprintf (ptr, remaining, "%s 200 OK\r\nAccept-Ranges: bytes\r\n%s"
-                        "%s: %s\r\n", protocol, TE, contenttypehdr, contenttype);
+
+                bytes = snprintf (ptr, remaining, "%s 200 OK\r\n%s"
+                        "%s: %s\r\n%s", protocol, TE, contenttypehdr, contenttype, datebuf);
             }
         }
         remaining -= bytes;