Log Message:
Update uim to 1.8.6.
(now, editline is in pkgsrc, so optionify editline support).

Overview of changes from 1.8.5 to 1.8.6
=======================================
* Fixes
  - libuim
    * Add XDG_RUNTIME_DIR support (by tagoh)
  - po
    * List language names on each line in LINGUAS (by naota)
  - uim-canna
    * Avoid a crash when a Canna server name is specified (by Kouichi ONO)

* Enhancements
  - uim-m17nlib
    * Add an option to set a candidate windows to be visiable or hidden
  - uim-tutcode
    * Updated trycode composition table retrieved 2013-06-26

Overview of changes from 1.8.4 to 1.8.5
=======================================
* Fixes
  - uim-gtk2
  - uim-gtk3
    * Avoid an infinite recursion when no preedit is started (by tagoh)

  - uim-tutcode
    * Fix behavior of postfix katakana conversion