Enh 0003841: Add real name ability to mantis

M lang/strings_english.txt

• Add necessary strings.

M admin/upgrades/0_18_inc.php

• Add realname field.

M manage_user_create.php
M manage_user_create_page.php
M manage_user_edit_page.php
M manage_user_page.php
M manage_user_update.php

• Setting and maintaining the realname.

M core/html_api.php

• Using the realname in the logged in as ...

M core/user_api.php

• Updating user_get_name() to return realname if not empty, otherwise return login name.

git-svn-id: http://mantisbt.svn.sourceforge.net/svnroot/mantisbt/trunk@2568 <a class="text" href="/?p=mantisbt.git;a=object;h=f5dc347c">f5dc347c</a>-c33d-0410-90a0-b07cc1902cb9