• core/bug_api.php
  (bug_set_field): new function
  (bug_assign): take a bugnote string as parameter and fix incorrect
  variable name ($t_handler_id)
  (bug_close): use bug_set_field()
  (bug_resolve): new function
• bug_actiongroup.php: cleanup to use new api functions

git-svn-id: http://mantisbt.svn.sourceforge.net/svnroot/mantisbt/trunk@1489 <a class="text" href="/?p=mantisbt.git;a=object;h=f5dc347c">f5dc347c</a>-c33d-0410-90a0-b07cc1902cb9