[PATCH] Document the version requirements of the varnishreplay input file.

[Martin Blix Grydeland]

---
 doc/sphinx/reference/varnishreplay.rst |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/doc/sphinx/reference/varnishreplay.rst b/doc/sphinx/reference/varnishreplay.rst
index 4be103f..da3df36 100644
--- a/doc/sphinx/reference/varnishreplay.rst
+++ b/doc/sphinx/reference/varnishreplay.rst
@@ -32,8 +32,9 @@ The following options are available:
 
 -D                   Turn on debugging mode.
 
--r file              Parse logs from this file.  This option is mandatory.
-
+-r file              Parse logs from this file.  The input file has to be from
+		     a varnishlog of the same version as the varnishreplay
+		     binary.  This option is mandatory.
 
 SEE ALSO
 ========
-- 
1.7.9.5