XEP-0432: add revision block

Signed-off-by: Maxime “pep” Buquet <[email protected]>

XEP-0432: add revision block

XEP-0356: Release version 0.4

- Add "iq" privilege (necessary to implement XEPs such as XEP-0376).
- Roster pushes are now transmitted to privileged entity with "roster" permission of "get" or "both". This can be disabled.
- Reformulate to specify than only initial stanza and "unavailable" <presence> stanzas are transmitted with "presence" pemission.
- Namespace bump.

XEP-0406: add revision block

XEP-0072, XEP-0096, XEP-0214: add revision block

XEP-0109: add revision block

XEP-0072, XEP-0096, XEP-0214: add revision block

XEP-0087: add revision block

XEP-0072, XEP-0096, XEP-0214: add revision block

Accept inbox/muc-affiliations-versioning.xml as XEP-0463