Japanese translation updates.
Japanese translation updates.

* subversion/po/ja.po: Make some improvements and terminological
  unifications.
  Now ja.po has 1671 translated messages against r27227 (Emacs PO-mode
  status: "1671t+632o").


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@871527 13f79535-47bb-0310-9956-ffa450edef68

wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion