ss: Usage filter state names, options alignment

Signed-off-by: Vadim Kochan <vadim4j@gmail.com>

misc/ss.c

@@ -3223,7 +3223,13 @@ static void _usage(FILE *dest)
 "\n"
 "   -D, --diag=FILE     Dump raw information about TCP sockets to FILE\n"
 "   -F, --filter=FILE   read filter information from FILE\n"
-"       FILTER := [ state TCP-STATE ] [ EXPRESSION ]\n"
+"       FILTER := [ state STATE-FILTER ] [ EXPRESSION ]\n"
+"       STATE-FILTER := {all|connected|synchronized|bucket|big|TCP-STATES}\n"
+"         TCP-STATES := {established|syn-sent|syn-recv|fin-wait-{1,2}|time-wait|closed|close-wait|last-ack|listen|closing}\n"
+"          connected := {established|syn-sent|syn-recv|fin-wait-{1,2}|time-wait|close-wait|last-ack|closing}\n"
+"       synchronized := {established|syn-recv|fin-wait-{1,2}|time-wait|close-wait|last-ack|closing}\n"
+"             bucket := {syn-recv|time-wait}\n"
+"                big := {established|syn-sent|fin-wait-{1,2}|closed|close-wait|last-ack|listen|closing}\n"
 		);
 }