Log Message:
Update mlterm to 3.6.1. (leaf package update)

pkgsrc changes:
 - explicitly specify configure options which are changed to default
 - make scim configurable via option.mk (disabled by default)

Changes noted in doc/en/ReleaseNote:

ver 3.6.1
* Support DECDHL and DECDWL.
* Support button event mouse tracking (CSI?1002) and any event mouse tracking \ 
(CSI?1003)
  in MacOSX/Cocoa and Android.
* Support blinking cursor in MacOSX/Cocoa.
* Add 'autohide' value to 'scrollbar_mode' option.
* Disable conversion from Unicode to ISCII if use_ctl = false.
* Drop mlterm.ti and mlterm.tc which haven't been maintained recently.
* Build 'extra' and 'pixmap_engine' scrollbars by default.
* Enable following configure options by default.
  --enable-ind, --enable-ssh2, --enable-utmp, --enable-uim, --enable-m17nlib,
  --enable-scim, --enable-ibus, --enable-fcitx, --enable-canna, --enable-wnn
* Support ssh2 connection on framebuffer.
* Set XID of text screen instead of top window as the value of WINDOWID \ 
environmental variable.
* Bug fixes:
  Fix a bug which disabled CSI?3h and CSI?3l. (Enbugged at 3.6.0)