Add an initial set of privilege support to OpenDS.  The current privileges are
currently defined and implemented:
* config-read (allow reading the configuration)
* config-write (allow updating the configuration)
* ldif-import (allow invoking LDIF import tasks)
* ldif-export (allow invoking LDIF export tasks)
* backend-backup (allow invoking backup tasks)
* backend-restore (allow invoking restore tasks)
* server-shutdown (allow invoking server shutdown tasks)
* server-restart (allow invoking server restart tasks)
* server-restart (allow invoking server restart tasks)
* password-reset (allow resetting user passwords)
* update-schema (allow updating the server schema)
* privilege-change (allow changing the set of privileges for a user)

The following privileges are also defined but not yet implemented:
* bypass-acl (allow bypassing access control evaluation)
* modify-acl (allow updating access control definitions)
* jmx-read (allow reading information over JMX)
* jmx-write (allow updating information over JMX)
* jmx-notify (allow subscribing to JMX notifications)
* proxied-auth (allow the use of proxied authorization and SASL authzid)
* disconnect-request (allow terminating arbitrary client connections)
* cancel-request (allow canceling arbitrary client connections)
* search-unindexed (allow requesting unindexed searches)
* data-sync (allow participating in a data synchronization environment)

Root users automatically inherit a subset of these privileges by default, and
users can also be explicitly granted or forbidden the use of specified
privileges.

OpenDS Issue Numbers:  468, 472, 474, 475, 477, 1213