*: use long long to print time_t

Since we can't assume time_t to be long, int, or even long long, this
consistently uses %lld/long long (or %llu/unsigned long long in a few
cases) to print time_t/susecond_t values.  This should fix a bunch of
warnings, on NetBSD in particular.

(Unfortunately, there seems to be no "PRId64" style printing macro for
time_t...)

Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
diff --git a/ospf6d/ospf6_spf.c b/ospf6d/ospf6_spf.c
index d0e9101..47a655c 100644
--- a/ospf6d/ospf6_spf.c
+++ b/ospf6d/ospf6_spf.c
@@ -601,11 +601,12 @@
   ospf6_spf_reason_string(ospf6->spf_reason, rbuf, sizeof(rbuf));
 
   if (IS_OSPF6_DEBUG_SPF (PROCESS) || IS_OSPF6_DEBUG_SPF (TIME))
-    zlog_debug ("SPF runtime: %ld sec %ld usec",
-		runtime.tv_sec, runtime.tv_usec);
+    zlog_debug ("SPF runtime: %lld sec %lld usec",
+		(long long)runtime.tv_sec, (long long)runtime.tv_usec);
 
-  zlog_info("SPF processing: # Areas: %d, SPF runtime: %ld sec %ld usec, "
-	    "Reason: %s\n", areas_processed, runtime.tv_sec, runtime.tv_usec,
+  zlog_info("SPF processing: # Areas: %d, SPF runtime: %lld sec %lld usec, "
+	    "Reason: %s\n", areas_processed,
+	    (long long)runtime.tv_sec, (long long)runtime.tv_usec,
 	    rbuf);
   ospf6->last_spf_reason = ospf6->spf_reason;
   ospf6_reset_spf_reason(ospf6);
diff --git a/ospf6d/ospf6_top.c b/ospf6d/ospf6_top.c
index e4e6f17..7fffba8 100644
--- a/ospf6d/ospf6_top.c
+++ b/ospf6d/ospf6_top.c
@@ -663,8 +663,9 @@
       timerstring(&result, buf, sizeof(buf));
       ospf6_spf_reason_string(o->last_spf_reason, rbuf, sizeof(rbuf));
       vty_out(vty, "last executed %s ago, reason %s%s", buf, rbuf, VNL);
-      vty_out (vty, " Last SPF duration %ld sec %ld usec%s",
-	       o->ts_spf_duration.tv_sec, o->ts_spf_duration.tv_usec, VNL);
+      vty_out (vty, " Last SPF duration %lld sec %lld usec%s",
+               (long long)o->ts_spf_duration.tv_sec,
+               (long long)o->ts_spf_duration.tv_usec, VNL);
     }
   else
     vty_out(vty, "has not been run$%s", VNL);
diff --git a/ospf6d/ospf6d.h b/ospf6d/ospf6d.h
index 4122b30..9e2efb4 100644
--- a/ospf6d/ospf6d.h
+++ b/ospf6d/ospf6d.h
@@ -71,19 +71,19 @@
       }                                               \
   } while (0)
 #endif /*timersub*/
-#define timerstring(tv, buf, size)                    \
-  do {                                                \
-    if ((tv)->tv_sec / 60 / 60 / 24)                  \
-      snprintf (buf, size, "%ldd%02ld:%02ld:%02ld",   \
-                (tv)->tv_sec / 60 / 60 / 24,          \
-                (tv)->tv_sec / 60 / 60 % 24,          \
-                (tv)->tv_sec / 60 % 60,               \
-                (tv)->tv_sec % 60);                   \
-    else                                              \
-      snprintf (buf, size, "%02ld:%02ld:%02ld",       \
-                (tv)->tv_sec / 60 / 60 % 24,          \
-                (tv)->tv_sec / 60 % 60,               \
-                (tv)->tv_sec % 60);                   \
+#define timerstring(tv, buf, size)                      \
+  do {                                                  \
+    if ((tv)->tv_sec / 60 / 60 / 24)                    \
+      snprintf (buf, size, "%lldd%02lld:%02lld:%02lld", \
+                (tv)->tv_sec / 60LL / 60 / 24,          \
+                (tv)->tv_sec / 60LL / 60 % 24,          \
+                (tv)->tv_sec / 60LL % 60,               \
+                (tv)->tv_sec % 60LL);                   \
+    else                                                \
+      snprintf (buf, size, "%02lld:%02lld:%02lld",      \
+                (tv)->tv_sec / 60LL / 60 % 24,          \
+                (tv)->tv_sec / 60LL % 60,               \
+                (tv)->tv_sec % 60LL);                   \
   } while (0)
 #define timerstring_local(tv, buf, size)                  \
   do {                                                    \