Support management of multiple <role>s

As with support there can be multiple per and global s management support in the admin/ interface needs update.

there are 3 most major parts of this:

1. defining format and outputting information about those s on a given (mount or global) object.
2. update the admin/*.xsl files to reflect the new interface.
3. update command_manageauth() to reflect the changes.

Please define a format for the output and reassign to me after that. Examples:

<authentication>
 <role id="xxx" name="yyy" />
 <role id="xxx" name="yyy" />
 <role id="xxx" name="yyy" />
</authentication>

<authentication>
 <role>
  <id>yyy</id>
  <name>xxx</name>
 </role>
 <role>
  <id>yyy</id>
  <name>xxx</name>
 </role>
 <role>
  <id>yyy</id>
  <name>xxx</name>
 </role>
</authentication>

The first example mimics the config file format. The second is more to how stuff in admin/* has been.