appending to an attribute

[Peter Schober]

* Clayton <upnyhgb8v6 at snkmail.com> [2018-08-06 21:30]:
> So we have an "employeeID" attribute that's already like "0123456789" and
> they want it to come across as "0123456789_ID".

Also, doing this is rather idiotic since the static string by
definition will be identical for all subjects and therefore not carry
any information. If they need weird formatting with useless strings
added to work around some issue within their own application they
might as well do that themselfs on the recieving end, IMO.
-peter