Log Message:
Update mlterm to 3.5.0.

pkgsrc changes:
 - handle new canna and wnn input method plugins as options
 - remove post-3.4.5 patch
 - pull the following post-3.5.0 Romanized Japanese conversion updates for wnn:
   \ 
https://bitbucket.org/arakiken/mlterm/commits/8de212cf5b3ec7f77ce1f9f6aa66770cb28b935e

Changes noted in doc/en/ReleaseNote:

ver 3.5.0
* Support WSDISPLAYIO_GET_FBINFO on NetBSD/framebuffer.
* Support Canna (--im canna) and Freewnn (--im wnn) as input method plugins.
* Support vertical and horizontal screen separation.
  (Note that -s=false option disables not only scrollbar but also screen separation.)
* Add HSPLIT_SCREEN(Shift+F1), VSPLIT_SCREEN(Shift+F2), NEXT_SCREEN(Shift+F3),
  PREV_SCREEN(Shift+F4), CLOSE_SCREEN(Shift+F5), HEXPAND_SCREEN(Shift+F6) and
  VEXPAND_SCREEN(Shift+F7) to shortcut key settings.
* Add "hsplit_screen", "vsplit_screen", \ 
"hresize_screen", "vresize_screen" and
  "next_screen" to OSC 5379.
* Rename "use_scrollbar" option to "use_mdi" which enables \ 
not only scrollbar but
  also screen separation.
* Support Allow132 (CSI?40h, CSI?40l).
  (Merge https://gist.github.com/saitoha/4b320b9cb6d637d14dbc)
* HankakuZenkaku key works on Linux/framebuffer.
* Bug fixes:
  Fix stiff behavior of "use_local_echo=true" on ssh connection by libssh2.
  Fix a bug which disabled OSC 5379 show_picture URL on all platforms except win32.
  (enbugged at 3.4.2)