Log Message:
mlterm: update to 3.9.2.

pkgsrc changes:
* switch MASTER_SITES to GitHub
* use GTK3 instead of GTK2
* remove local patches integreated into upstream (#5)

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

ver 3.9.2
* Support Fcitx5.
* Support GTK4 for mlconfig. (./configure --with-gtk=4.0)
* Support CSI > Ps q (XTVERSION). (Response: DCS>|mlterm(3.9.2)ST)
* Add "MOSH_UDP_PORT" environmental variable to specify UDP port or \ 
port-range
  to communicate with a mosh server.
* Add INSERT_CLIPBOARD shortcut key.
  (https://github.com/arakiken/mlterm/issues/19)
* Add --fk / format_other_keys option (equivalent to "formatOtherKeys" \ 
of xterm), and
  change the default format of the escape sequence with modifyOtherKeys from
  CSI Ps; Ps u to CSI 27; Ps; Ps ~.
* Add --with-iconv, --disable-daemon, --disable-split and --disable-zmodem
  options to ./configure script.
* Add vte 0.66 API symbols to libvte compatible library.
* Show server list dialog at startup on Android.
* It is deprecated to use "mlterm" as the value of termtype / -y option.
* 'termcap' config file stops to accept multiple terminal types concated by '|'
  (e.g. xterm|xterm-256) as key.
* Arabic ligatures (U+644-U+622, U+644-U+622, U+644-U+625, U+644-U+627) occupy
  two logical columns instead of one even if --dyncomb option isn't specified.
* KBD_INPUT_NUM and MOUSE_INPUT_NUM environmental variables (for mlterm-fb)
  accept multiple device numbers by "<num>,<num>".
* Show "Config: key=value" only if shortcut keys whose format is
  "proto:(echo)key=value" is pressed.
* Merge patches:
  https://github.com/arakiken/mlterm/pull/5.
  https://github.com/arakiken/mlterm/pull/9.
  https://github.com/arakiken/mlterm/pull/12.
  https://github.com/arakiken/mlterm/pull/22.
* Bug fixes:
  Fix https://github.com/arakiken/mlterm/issues/15.
  Fix https://github.com/arakiken/mlterm/issues/18.
  Fix https://github.com/arakiken/mlterm/issues/24.
  Fix https://github.com/arakiken/mlterm/issues/28.
  Fix failure of restarting mlterm on Android. (Enbugged at 3.9.1)
  Fix segfault if mlterm screen with -t option goes outside of the display.
  Fix emoji glyphs becoming too large with cairo.
  Fix corrupt value of "word_separator" option which mlconfig outputs.
  Fix incompatibility with xterm in pressing Shift + a-z keys etc if \ 
modifyOtherKeys is 1.
  (https://github.com/arakiken/mlterm/issues/21)
  Fix segfault in opening a new roxterm tab with libvte compatible library on \ 
wayland.