• core/utility_api.php
  (ini_get_bool): new function that gets a php ini variable but converts it to a bool first

• core/file_api.php
  (file_allow_project_upload): use ini_get_bool()

  (file_allow_bug_upload): use ini_get_bool()

git-svn-id: http://mantisbt.svn.sourceforge.net/svnroot/mantisbt/trunk@1710 <a class="text" href="/?p=mantisbt.git;a=object;h=f5dc347c">f5dc347c</a>-c33d-0410-90a0-b07cc1902cb9