Copying the request parameters to Solr's response

[Bertrand Delacretaz]

Hi,

I need to implement paging of Solr result sets, and (unless I have
overlooked something that already exists) it would be useful to copy
the request parameters to the output.

I'm thinking of adding something like this to the XML output:

 <responseHeader>
     <lst name="queryParameters">
       <str name="q">author:Leonardo</str>
       <str name="start">24</str>
       <str name="rows">12</str>
  etc...

I don't think the SolrParams class provides an Iterator to retrieve
all parameters, I'll add one to implement this.

WDYT?

-Bertrand