Fixed 0002626: $g_primary_table_tags is documented and in config files but never
used.

M config_defaults_inc.php

• Removed from default configs.

M core/obsolete.php

• Added primary_table_tags to obsolete configs.
• Added other configs that were made obsolete by the CSS changes.

I didn't bother to change doc/configuration.html since it is out of date
anyway. We will need to overwrite it with a version from the manual.

git-svn-id: http://mantisbt.svn.sourceforge.net/svnroot/mantisbt/trunk@2068 <a class="text" href="/?p=mantisbt.git;a=object;h=f5dc347c">f5dc347c</a>-c33d-0410-90a0-b07cc1902cb9