LinkTool doesn't handle appending params properly

When using the LinkTool (generic) to append parameters, the call to appendParam(String, key, String value) uses instanceof to see if the parameter to append to is a List object, but the query is populated with Array objects from request.getParameterMap().

Just need to change generic.LinkTool.java:547 from 'if (cur instanceof List)' to 'if (cur instanceof List || cur instanceof Array)'.

Call to addToList already handles List vs Arrays, so I don't think any other changes need to be put in place.