fix for 0005247: Real email addresses are visible when using reminders

• suppress email address in body based on config show_user_email_threshold

git-svn-id: http://mantisbt.svn.sourceforge.net/svnroot/mantisbt/trunk@3414 <a class="text" href="/?p=mantisbt.git;a=object;h=f5dc347c">f5dc347c</a>-c33d-0410-90a0-b07cc1902cb9