ss: Filter inet dgram sockets with established state by default

As inet dgram sockets (udp, raw) can call connect(...)  - they
might be set in ESTABLISHED state. So keep the original behaviour of
'ss' which filtered them by ESTABLISHED state by default. So:

    $ ss -u

    or

    $ ss -w

Will show only ESTABLISHED UDP sockets by default.
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>

misc/ss.c

@@ -170,11 +170,11 @@ static const struct filter default_dbs[MAX_DB] = {
 		.families = (1 << AF_INET) | (1 << AF_INET6),
 	},
 	[UDP_DB] = {
-		.states   = (1 << SS_CLOSE),
+		.states   = (1 << SS_ESTABLISHED),
 		.families = (1 << AF_INET) | (1 << AF_INET6),
 	},
 	[RAW_DB] = {
-		.states   = (1 << SS_CLOSE),
+		.states   = (1 << SS_ESTABLISHED),
 		.families = (1 << AF_INET) | (1 << AF_INET6),
 	},
 	[UNIX_DG_DB] = {