fixes for the lcpdroc client iface screen on *BSD (M.Dolze):

1. If an interface priviously been UP goes DOWN, the time when the
   interface changed would always show the current time.
2. If an active interface is removed from the system, the server would
   still show the old screens and the user will not get any notice.
3. The "first run" detection would not work if more than one interface
   is monitored. Now the "last_online" time is used, because this is an
   "per interface" value initialized to 0 at startup.
4. The TRUE/FALSE macros are used for the return values as in the other
   functions.

clients/lcdproc/machine_FreeBSD.c

@@ -439,7 +439,6 @@ static int swapmode(int *retavail, int *retfree)
  */
 int machine_get_iface_stats (IfaceInfo *interface)
 {
-	static int      first_time = 1;	/* is it first time we call this function? */
 	int             rows;
 	int             name[6] = {CTL_NET, PF_LINK, NETLINK_GENERIC, IFMIB_IFDATA, 0, IFDATA_GENERAL};
 	size_t          len;
@@ -461,31 +460,32 @@ int machine_get_iface_stats (IfaceInfo *interface)
 			}
 			/* check if its interface name matches */
 			if (strcmp(ifmd.ifmd_name, interface->name) == 0) {
-				interface->last_online = time(NULL);	/* save actual time */
-
-				if ((ifmd.ifmd_flags & IFF_UP) == IFF_UP)
-					interface->status = up;	/* is up */
 
 				interface->rc_byte = ifmd.ifmd_data.ifi_ibytes;
 				interface->tr_byte = ifmd.ifmd_data.ifi_obytes;
 				interface->rc_pkt = ifmd.ifmd_data.ifi_ipackets;
 				interface->tr_pkt = ifmd.ifmd_data.ifi_opackets;
 
-				if (first_time) {
+				if (interface->last_online == 0) {
 					interface->rc_byte_old = interface->rc_byte;
 					interface->tr_byte_old = interface->tr_byte;
 					interface->rc_pkt_old = interface->rc_pkt;
 					interface->tr_pkt_old = interface->tr_pkt;
-					first_time = 0;	/* now it isn't first time */
 				}
-				return 1;
+
+				if ((ifmd.ifmd_flags & IFF_UP) == IFF_UP) {
+					interface->status = up;			/* is up */
+					interface->last_online = time(NULL);	/* save actual time */
+				}
+
+				return (TRUE);
 			}
 		}
 		/* if we are here there is no interface with the given name */
-		return 0;
+		return (TRUE);
 	} else {
 		perror("read sysctlbyname");
-		return 0;
+		return (FALSE);
 	}
 } /* get_iface_stats() */