[master] 6affa47 Add default format to -F explaination

[Per Andreas Buer]

commit 6affa47bc4aa7008ea56e81699bf99ec7cea63ec
Author: Per Buer <perbu at varnish-software.com>
Date:   Wed Jan 26 12:29:42 2011 +0100

    Add default format to -F explaination

diff --git a/doc/sphinx/reference/varnishncsa.rst b/doc/sphinx/reference/varnishncsa.rst
index 42fb09a..13fc82a 100644
--- a/doc/sphinx/reference/varnishncsa.rst
+++ b/doc/sphinx/reference/varnishncsa.rst
@@ -48,7 +48,12 @@ The following options are available:
 -f          Prefer the X-Forwarded-For HTTP header over client.ip in 
 	    the log output.
 
--F format   Specify the log format used.  Supported formatters are:
+-F format   Specify the log format used. If no format is specified the  
+   	    default log format is used. Currently it is:
+
+            %h %l %u %t "%r" %>s %b "%{Referer}i" "%{User-agent}i"
+
+	    Supported formatters are:
 
 	      %b 
 	         Size of response in bytes, excluding HTTP headers.