[4.1] f364d4a Specify that time is in seconds

[PÃ¥l Hermunn Johansen]

commit f364d4aab7795a5bbe805fc5de8918abf366d3b7
Author: Federico G. Schwindt <fgsch at lodoss.net>
Date:   Thu Oct 12 07:46:30 2017 +0100

    Specify that time is in seconds
    
    Addresses #2456 in a different way.

diff --git a/doc/sphinx/reference/varnishncsa.rst b/doc/sphinx/reference/varnishncsa.rst
index 708989d..5744810 100644
--- a/doc/sphinx/reference/varnishncsa.rst
+++ b/doc/sphinx/reference/varnishncsa.rst
@@ -151,9 +151,10 @@ Supported formatters are:
   Extended variables.  Supported variables are:
 
   Varnish:time_firstbyte
-    Time from when the request processing starts until the first byte
-    is sent to the client.  For backend mode: Time from the request was
-    sent to the backend to the entire header had been received.
+    Time from when the request processing starts until the first
+    byte is sent to the client, in seconds.  For backend mode: Time
+    from the request was sent to the backend to the entire header
+    had been received.
 
   Varnish:hitmiss
     Whether the request was a cache hit or miss. Pipe and pass are