Log Message:
Update to 2.32
 - Update pkgsrc Makefile to require emacs version >= 27 for json and
   'string-distance.  use ALL_ENV for utf8 settings
 - cleanups for pthai-url-* functions
 - remove custom variable 'pthai-audio-download-non-dictionary
 - change custom variable 'pthai-audio-download to 3-state variable
   from boolean, add 'pthai-mp3-permit-fetch to accommodate change
 - add 'pthai-fetch-silence to disable messaging during downloads,
   simplify 'pthai-download-and-play, 'pthai-highlight-say-bounds,
   'pthai-mp3-fetch and various 'pthai-audio-* control flags