sockstat: change check for wildcard sockets to avoid historical classes

sockstat was checking whether a bound address was "host 0", the lowest
host on a network, using inet_lnaof().  This only works for class A/B/C.
However, it isn't useful to bind such an address unless it is really
the unspecified address INADDR_ANY.  Change the check to to use that.

MFC after:	1 month
Reviewd by:	tuexen
Differential Revision: https://reviews.freebsd.org/D32715

usr.bin/sockstat/sockstat.c

@@ -874,7 +874,7 @@ printaddr(struct sockaddr_storage *ss)
 
 	switch (ss->ss_family) {
 	case AF_INET:
-		if (inet_lnaof(sstosin(ss)->sin_addr) == INADDR_ANY)
+		if (sstosin(ss)->sin_addr.s_addr == INADDR_ANY)
 			addrstr[0] = '*';
 		port = ntohs(sstosin(ss)->sin_port);
 		break;