bgpd: peer_uptime overflows after 1 year

* bgpd.c: (peer_uptime) Wraps after 1 year, and doesn't indicate years.
  Fix. Assume a year is 365 days, for an easy life.

Fixes: Bug #836
Reported-by: Rolf Hanßen
Acked-by: Donald Sharp <sharpd@cumulusnetworks.com>
diff --git a/bgpd/bgpd.c b/bgpd/bgpd.c
index 4de854e..7a0274c 100644
--- a/bgpd/bgpd.c
+++ b/bgpd/bgpd.c
@@ -4699,10 +4699,11 @@
   uptime1 = bgp_clock ();
   uptime1 -= uptime2;
   tm = gmtime (&uptime1);
-
+  
   /* Making formatted timer strings. */
 #define ONE_DAY_SECOND 60*60*24
-#define ONE_WEEK_SECOND 60*60*24*7
+#define ONE_WEEK_SECOND ONE_DAY_SECOND*7
+#define ONE_YEAR_SECOND ONE_DAY_SECOND*365
 
   if (uptime1 < ONE_DAY_SECOND)
     snprintf (buf, len, "%02d:%02d:%02d", 
@@ -4710,9 +4711,13 @@
   else if (uptime1 < ONE_WEEK_SECOND)
     snprintf (buf, len, "%dd%02dh%02dm", 
 	      tm->tm_yday, tm->tm_hour, tm->tm_min);
-  else
+  else if (uptime1 < ONE_YEAR_SECOND)
     snprintf (buf, len, "%02dw%dd%02dh", 
 	      tm->tm_yday/7, tm->tm_yday - ((tm->tm_yday/7) * 7), tm->tm_hour);
+  else
+    snprintf (buf, len, "%02dy%02dw%dd", 
+	      tm->tm_year - 70, tm->tm_yday/7, 
+	      tm->tm_yday - ((tm->tm_yday/7) * 7));
   return buf;
 }