An indication of whether VTP pruning is enabled or disabled
in this managament domain.
This object can only be modified, either when the
corresponding instance value of managementDomainVersionInUse
is 'version1' or 'version2' and the corresponding instance
value of managementDomainLocalMode is 'server', or when the
corresponding instance value of managementDomainVersionInUse
is 'version3' and the corresponding instance value of
managementDomainLocalMode is 'server' or 'client'.