pz:limitmap now in use

pz:limitmap now in use

pz:limitmap[name] is used as query translation when applying
limit parameter for search. Previously, pz:facetmap was used.
pz:limitmap[name] can have one of two forms (types). The leading
type is followed immedately by colon then by form specific name.
For type "ccl:" the value is an existing cclmap.  Example:
limitmap[author]="ccl:au", which could work for many existing Z39.50
targets. For type "rpn:" the value is PQF verbatim. Example:
limitmap[author]="rpn:@attr 1=1003 @attr 6=3" (author, complete field).