Remove arbitrary 1.0 threshold in varnishtop -1

With that both -d and -1 options report the same output, with the former
limited to the terminal height. While this increases the risk of "never
ending" dumps of log records showing only once, the assumption is that
varnishtop is useful when someone is looking for something in particular.
Restricting the output to the records someone is interested in mitigates
the risk.

Fixes #2686

bin/varnishtest/tests/r02686.vtc

+varnishtest "varnishtop -1/-d"
+
+server s1 {
+        rxreq
+        txresp
+} -start
+
+varnish v1 -vcl+backend { } -start
+
+client c1 {
+        txreq
+        rxresp
+} -run
+
+process p1 -dump {varnishtop -n ${v1_name} -d -i ReqMethod} -start
+process p1 -winsz 30 80
+delay 2
+process p1 -expect-text 1  1 "list length 1"
+process p1 -expect-text 1 75 "(EOF)"
+process p1 -expect-text 3  6 "1.00 ReqMethod      GET"
+process p1 -screen_dump -wait
+
+process p2 -dump {varnishtop -n ${v1_name} -1 -i ReqMethod} -start
+process p2 -winsz 30 80
+delay 2
+process p2 -expect-text 1 6 "1.00 ReqMethod GET"
+process p2 -screen_dump -wait

bin/varnishtop/varnishtop.c

@@ -322,8 +322,6 @@ dump(void)
 	struct top *tp, *tp2;
 	for (tp = VRB_MIN(t_order, &h_order); tp != NULL; tp = tp2) {
 		tp2 = VRB_NEXT(t_order, &h_order, tp);
-		if (tp->count <= 1.0)
-			break;
 		printf("%9.2f %s %*.*s\n",
 			tp->count, VSL_tags[tp->tag],
 			tp->clen, tp->clen, tp->rec_data);