tc: improve filter help texts a bit

This fixes a few syntax errors and changes route filter help text to use
classid instead of flowid to be consistent with other filters' help
texts.
Signed-off-by: Phil Sutter <phil@nwl.cc>

tc/f_flower.c

@@ -28,7 +28,7 @@ static void explain(void)
 	fprintf(stderr, "                  [ action ACTION-SPEC ] [ classid CLASSID ]\n");
 	fprintf(stderr, "\n");
 	fprintf(stderr, "Where: MATCH-LIST := [ MATCH-LIST ] MATCH\n");
-	fprintf(stderr, "       MATCH      := [ indev DEV-NAME | \n");
+	fprintf(stderr, "       MATCH      := { indev DEV-NAME | \n");
 	fprintf(stderr, "                       dst_mac MAC-ADDR | \n");
 	fprintf(stderr, "                       src_mac MAC-ADDR | \n");
 	fprintf(stderr, "                       eth_type [ipv4 | ipv6 | ETH-TYPE ] | \n");
@@ -36,7 +36,7 @@ static void explain(void)
 	fprintf(stderr, "                       dst_ip [ IPV4-ADDR | IPV6-ADDR ] | \n");
 	fprintf(stderr, "                       src_ip [ IPV4-ADDR | IPV6-ADDR ] | \n");
 	fprintf(stderr, "                       dst_port PORT-NUMBER | \n");
-	fprintf(stderr, "                       src_port PORT-NUMBER | \n");
+	fprintf(stderr, "                       src_port PORT-NUMBER }\n");
 	fprintf(stderr,	"       FILTERID := X:Y:Z\n");
 	fprintf(stderr,	"       ACTION-SPEC := ... look at individual actions\n");
 	fprintf(stderr,	"\n");

tc/f_route.c

@@ -28,7 +28,7 @@
 static void explain(void)
 {
 	fprintf(stderr, "Usage: ... route [ from REALM | fromif TAG ] [ to REALM ]\n");
-	fprintf(stderr, "                [ flowid CLASSID ] [ action ACTION_SPEC ]]\n");
+	fprintf(stderr, "                [ classid CLASSID ] [ action ACTION_SPEC ]\n");
 	fprintf(stderr, "       ACTION_SPEC := ... look at individual actions\n");
 	fprintf(stderr, "       CLASSID := X:Y\n");
 	fprintf(stderr, "\nNOTE: CLASSID is parsed as hexadecimal input.\n");

tc/f_rsvp.c

@@ -27,7 +27,7 @@
 static void explain(void)
 {
 	fprintf(stderr, "Usage: ... rsvp ipproto PROTOCOL session DST[/PORT | GPI ]\n");
-	fprintf(stderr, "                [ sender SRC[/PORT | GPI ]\n");
+	fprintf(stderr, "                [ sender SRC[/PORT | GPI ] ]\n");
 	fprintf(stderr, "                [ classid CLASSID ] [ action ACTION_SPEC ]\n");
 	fprintf(stderr, "                [ tunnelid ID ] [ tunnel ID skip NUMBER ]\n");
 	fprintf(stderr, "Where: GPI := { flowlabel NUMBER | spi/ah SPI | spi/esp SPI |\n");