+This file is free documentation; the Free Software Foundation +gives unlimited permission to copy and/or distribute it, +with or without modifications, as long as this notice is preserved.
The text which rms specified for such things (ensconced in maintain.texi) is: Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved. Personally I like your version better, but I feel compelled to mention it anyway ...