xep: updated XEP-0356 (privileged entity): Several updates according to feedbacks + review: - added links to PEP and namespace delegation XEPs - removed MUST for default values in configuration - <forwarded/> element is now a child of a <privilege/> element - <perm/> "namespace" attribute has been renamed to "access" - "headline" type restriction for "message" privilege has been removed - "message" permission violation now result in a "forbidden" message error - for "presence" permission, only <presence/> stanza with no type or with a "unavailable" type are sent to privileged entity - added specifitation for "presence" if a managed entity is unavailable and if a privileged entity is available after first <presence/> stanzas have been received - added Business Rules section - Updated namespace to reflect incompatible changes

$ORIGIN 0.0.127.in-addr.arpa.
$TTL 1D
@     IN SOA  <hostname>.<domain>. <hostname>.<domain>. (
              <date>     ; serial
              28800      ; refresh (8 hours)
              14400      ; retry (4 hours)
              2419200    ; expire (4 weeks)
              86400      ; minimum (1 day)
              )

              NS      <hostname>.<domain>.
1             PTR     <hostname>.<domain>.