Log Message:
mlterm: update to 3.9.3.

pkgsrc changes:
* make mlconfig.po installed properly (#66)
* remove local patches integrated into upstream

Upstream changes (noted in doc/en/ReleaseNote):

ver 3.9.3
* mlterm-wl supports xdg-decoration.
* Add --disable-compact-truecolor option to ./configure script.
* Add vte 0.68 API symbols to libvte compatible library.
* Add libvterm 0.2 API symbols to libvterm compatible library.
* Add --sdpr / simple_scrollbar_dpr option.
  (https://github.com/arakiken/mlterm/issues/64)
* Set "COLORTERM=truecolor" environmental variable.
  (https://github.com/arakiken/mlterm/issues/36)
* Update unicode property table (generated from UnicodeData.txt and
  EastAsianWidth.txt) to version 15.0.0.
* Support mosh-1.4.0.
* Merge patches:
  https://github.com/arakiken/mlterm/pull/45.
  https://github.com/arakiken/mlterm/pull/46.
  https://github.com/arakiken/mlterm/pull/48.
  https://github.com/arakiken/mlterm/pull/49.
  https://github.com/arakiken/mlterm/pull/55. (Add --role / wm_role option)
  https://github.com/arakiken/mlterm/pull/57.
  https://github.com/arakiken/mlterm/pull/61.
  https://github.com/arakiken/mlterm/pull/62.
  https://github.com/arakiken/mlterm/pull/63.
* Bug fixes:
  Fix https://github.com/arakiken/mlterm/issues/34.
  Fix https://github.com/arakiken/mlterm/issues/35.
  Fix https://github.com/arakiken/mlterm/issues/39.
  Fix https://github.com/arakiken/mlterm/issues/44.
  Fix https://github.com/arakiken/mlterm/issues/50.
  Fix https://github.com/arakiken/mlterm/issues/51.
  Fix https://github.com/arakiken/mlterm/issues/53.
  Fix https://twitter.com/isaki68k/status/1555895011991883783.
  Fix segfault in starting mlterm with --dyncomb and --otl.