[master] 6324d39 It's resp.reason, not req.reason

[Geoff Simmons]

commit 6324d396262eea7ed172a7d2007753302f5850ad
Author: Geoff Simmons <geoff at uplex.de>
Date:   Tue Mar 14 15:44:33 2017 +0100

    It's resp.reason, not req.reason

diff --git a/doc/sphinx/whats-new/upgrading-5.1.rst b/doc/sphinx/whats-new/upgrading-5.1.rst
index e3bc039..4d15c88 100644
--- a/doc/sphinx/whats-new/upgrading-5.1.rst
+++ b/doc/sphinx/whats-new/upgrading-5.1.rst
@@ -181,7 +181,7 @@ All VCL subroutines (except ``vcl_fini``)
 
 * VCL failure is invoked on any attempt to set one of the fields in the
   the first line of a request or response to the empty string, such
-  as ``req.url``, ``req.proto``, ``req.reason`` and so forth.
+  as ``req.url``, ``req.proto``, ``resp.reason`` and so forth.
 
 Client-side VCL subroutines
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~