pkg/netutil: not export resolve and urlsEqual functions

They are only used in this package, so there is no need to public them.

pkg/netutil/netutil_test.go

@@ -124,7 +124,7 @@ func TestResolveTCPAddrs(t *testing.T) {
 			}
 			return &net.TCPAddr{IP: net.ParseIP(tt.hostMap[host]), Port: i, Zone: ""}, nil
 		}
-		err := ResolveTCPAddrs(tt.urls...)
+		err := resolveTCPAddrs(tt.urls...)
 		if tt.hasError {
 			if err == nil {
 				t.Errorf("expected error")
@@ -244,7 +244,7 @@ func TestURLsEqual(t *testing.T) {
 	}
 
 	for _, test := range tests {
-		result := URLsEqual(test.a, test.b)
+		result := urlsEqual(test.a, test.b)
 		if result != test.expect {
 			t.Errorf("a:%v b:%v, expected %v but %v", test.a, test.b, test.expect, result)
 		}