* mount.h (fs_info::inited): New inline method.

	* mount.h (fs_info::inited): New inline method.
	* path.cc (path_conv::check): Clear filesystem info if following a
	symlink.  Use new fs_info::inited method to check if FS info is already
	available.
	(symlink_info::check): Drop fs_update_called.  Use fs_info::inited
	method instead.  Streamline test for leading space and trailing dot or
	space.  Add comments.