[Solr Wiki] Update of "SolrTerminology" by HossMan

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The "SolrTerminology" page has been changed by HossMan:
http://wiki.apache.org/solr/SolrTerminology?action=diff&rev1=19&rev2=20

Comment:
NRT

     1. Another word for "Constraint"
     1. The "fq" param which constrains the results from a query without influencing the scores.
     1. Specifically referring to the Lucene "Filter" class
+  * '''''NRT''''': Near Real Time: This refers to the general concept of wanting document updates to be "immediately" visible to search clients.
   * '''''Request Handler''''': A Solr component that processes requests. For example, the DisMaxRequestHandler processes search queries by calling the DisMax Query Parser. Request Handlers can perform other functions, as well.
   * '''''QTime''''': The elapsed time (in milliseconds) between the arrival of the request (when the SolrQueryRequest object is created) and the completion of the request handler.  It does not include time spent in the response writer formatting/streaming the response to the client.
   * '''''Query Parser''''': A Solr component that parses the parameters and search terms submitted in a search query.