Log Message:
mlterm: update to 3.8.3.

Changes noted in doc/en/RelaseNote:

ver 3.8.3
* Add "trim_trailing_newline_in_pasting" / --trim option which removes \ 
trailing
  newline characters in pasting text.
* Add "broadcast" / --bc option which broadcasts input or pasted \ 
characters to
  all ptys whose value of "ignore_broadcasted_chars" option is false.
* Add "ignore_broadcasted_chars" / --ibc option.
* Add "Next pty", "Previous pty" and "Close \ 
screen" to context menu on Android.
* Add "next_pty", "prev_pty" and "close_screen" to \ 
OSC 5379.
* Add "fontconfig" to OSC 5380.
* Support libssh2 on MacOSX/Cocoa.
* Support ModifyCursorKeys and ModifyFunctionKeys of xterm.
* Support OSC 0 and OSC 1 on MacOSX/Cocoa.
* Support _NET_WM_NAME and _NET_ICON_NAME properties on xlib.
* Support "CSI > Ps t" and "CSI > Ps T".
* Support "CSI 20 h" and "CSI 20 l" (LNM).
* Support right click menu on libvte compatible library on wayland.
* Support fcitx input method module on wayland.
* Support italic on MacOSX/Cocoa.
* Remove --hscr / "screen_height_ratio" option.
* Change the default sequences of Modifier+Function and Modifier+Cursor keys
  from xterm's old/obsolete ones to modern ones.
  (e.g. Shift+F1 outputs "\e[1;2P" instead of "\eO2P" by \ 
default.)
* Merge patches:
  \ 
https://bitbucket.org/arakiken/mlterm/pull-requests/3/update-a-left-old-code-about-the
* Bug fixes:
  Fix a bug which disabled to assign keypad keys in ~/.mlterm/shortcut.
  Fix wrong processing of percentage in a font name on framebuffer and wayland.
  Fix alpha blending in drawing glyphs on wayland.
  Fix disappearance of the cursor if built with --enable-vt52 option.
  Fix a bug which shows wrong window title in a splited screen.
  Fix faulty drawing a wall picture in closing one of splitted screens.
  Fix segfault when mlterm exits after having reconnected to ssh server \ 
automatically.
  Fix segfault in using input method plugins (except ibus) on wayland.
  Fix unexpected fallback to "DEFAULT" font in DECDHL or DECDWL lines.
  Fix screen corruption of libvte compatible library in operating multiple tabs \ 
on wayland.
  Fix segfault on pause or resume on Android.