The value of svcDhcpLeaseModifyAncpString allows to
specify a new ANCP-string for this lease state.
When a SET of this object is done with a non empty string,
the system will attempt to assign a new ANCP-string.
A SET with an empty string has no effect on the system.
(NOOP).
GETs and GETNEXTs on this variable return an empty string.