trac nginx send file

api.sendfile.nginx.patch

--- /usr/local/lib/python2.7/site-packages/trac/web/api.py	2014-04-07 11:34:10.326789939 +0200
+++ /usr/local/lib/python2.7/site-packages/trac/web/api.py	2014-06-19 12:52:08.690985738 +0200
@@ -577,7 +577,7 @@
         self.send_header('Last-Modified', last_modified)
         use_xsendfile = getattr(self, 'use_xsendfile', False)
         if use_xsendfile:
-            self.send_header('X-Sendfile', os.path.abspath(path))
+            self.send_header('X-Accel-Redirect', os.path.abspath(path))
         self.end_headers()

         if not use_xsendfile and self.method != 'HEAD':