AbstractSecurityReport covers basic validation and utilities
common to the majority of the reports defined within RFC 3744.
||The AclPrincipalReport report returns the requested property set
for all principals in the DAV:acl property, that are identified by http(s)
URLs or by a DAV:property principal.
PrincipalMatchReport can be request for any collection resources.
PrincipalSearchReport performs a search for all principals
that match the search criteria specified in the request.
SearchablePropertyReport identifies those properties that may be
searched using the