Disable session_grace for now.

It is not clear if this is a benefit or not.  There seems to be a significant
(100msec ?) inter-request gap and seeting the grace period that long
means tying up worker threads doing basically nothing.

Setting a short timeout (10msec) results in an extra system call which
practically never does anything good.

Unless benefit is shown, this stuff should be removed again.


git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@993 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishd/mgt_param.c

@@ -321,7 +321,8 @@ static struct parspec parspec[] = {
 	{ "session_grace", tweak_session_grace,
 		"How long a workerthread waits for a new request to arrive "
 		"before sending the session to the herder.\n"
-		"Default is 10 msec.", "10" },
+	        "Units are milliseconds, zero disables.\n"
+		"Default is disabled.", "0" },
 	{ NULL, NULL, NULL }
 };