Put a starttime in shmem so varnishstat can show average rates.

git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@474 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishd/shmlog.c

@@ -134,6 +134,7 @@ VSL_Init(void)
 	/* XXX check sanity of loghead */
 	logstart = (unsigned char *)loghead + loghead->start;
 	AZ(pthread_mutex_init(&vsl_mutex, NULL));
+	loghead->starttime = time(NULL);
 	VSL_stats = &loghead->stats;
 }
 

include/shmlog.h

@@ -9,6 +9,8 @@
 
 #define SHMLOG_FILENAME		"/tmp/_.vsl"
 
+#include <time.h>
+
 #include "stats.h"
 
 struct shmloghead {
@@ -17,6 +19,8 @@ struct shmloghead {
 
 	unsigned		hdrsize;
 
+	time_t			starttime;
+
 	/*
 	 * Byte offset into the file where the fifolog starts
  	 * This allows the header to expand later.