Brazilian portuguese translation update.
Brazilian portuguese translation update.

 * subversion/po/pt_BR.po:
   Update translation to r21520.
   Fixed 1 fuzzy translations and 2 untranslated messages.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@861595 13f79535-47bb-0310-9956-ffa450edef68

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