Fixed bug 2488 (path name for link set determined incorrectly) by
	using only paths for link sets, never URIs.

	* tools/leak-checker/nautilus-leak-checker.c: Added more "known to
	leak" symbols.

	* libnautilus-extensions/nautilus-link-set.c: (create_new_link),
	(nautilus_link_set_is_installed), (nautilus_link_set_remove):
	Changed functions to always expect paths, so they can now use
	nautilus_make_path instead of link_set_path_name.
	* src/nautilus-sidebar.c: (metadata_button_callback): Changed to
	turn the URI into a path before calling the link-set functions.

	* libnautilus-extensions/nautilus-directory.c:
	(nautilus_directory_notify_files_moved): Use
	nautilus_file_list_free instead of
	nautilus_g_list_free_deep_custom.
	* libnautilus-extensions/nautilus-string-list.c:
	(nautilus_string_list_clear): Use nautilus_g_list_free_deep
	instead of nautilus_g_list_free_deep_custom.
	* libnautilus-extensions/nautilus-view-identifier.c:
	(nautilus_view_identifier_free_callback),
	(nautilus_view_identifier_list_free): Fixed call to
	nautilus_g_list_free_deep_custom so it doesn't need a function
	pointer type cast any more.