Add defs for default fetch cache connection limits and use them in

xbps_fetch_cache_connection() if 0 is passed as argument.

xbps-bin: enable fetch cached connection when downloading binpkgs.

--HG--
extra : convert_revision : xtraeme%40gmail.com-20100124153156-4updprik11nwi7c1

bin/xbps-bin/install.c

@@ -102,6 +102,9 @@ download_package_list(prop_object_iterator_t iter)
 	if (cachedir == NULL)
 		return EINVAL;
 
+	/* Set default limit of global and per-host cached connections */
+	xbps_fetch_set_cache_connection(0, 0);
+
 	while ((obj = prop_object_iterator_next(iter)) != NULL) {
 		found_binpkg = false;
 		if (!prop_dictionary_get_cstring_nocopy(obj,