Log Message:
Update mlterm to 3.5.1.

pkgsrc changes:
 - remove post-3.5.0 patch

Changes noted in doc/en/ReleaseNote:

ver 3.5.1
* Support font fallback on cairo.
* Improve romaji-kana conversion in using wnn as an input method.
  (Merge https://gist.github.com/tsutsui/1d4f9af3b4a53c906eb4)
* KBD_INPUT_NUM or MOUSE_INPUT_NUM environmental variables enable to specify N
  of /dev/input/eventN on Linux/framebuffer.
* Update unicode properties to 8.0.0.
* Add "layout_inner_border" / --lborder option.
* Add "use_extended_scroll_shortcut" to OSC 5379 and 5380.
* Add "Scroll by Shift+Up or Shift+Down" to "Others" tab of \ 
mlconfig.
* Add "Font width" (Narrow/Widen/Default) entry to "Font" \ 
tab of mlconfig.
* Bug fixes:
  Change the version of libvte 2.91 compatible library from 9.0.0 to 0.0.0
  Clean up utmp entry in exiting on NetBSD.