[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=15&rev2=16

Comment:
QTime

     1. The "fq" param which constrains the results from a query without influencing the scores.
     1. Specifically referring to the Lucene "Filter" class
   * '''''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.
   * '''''Searcher''''': In Solr parlance, the term "Searcher" tends to refer to an instance of the !SolrIndexSearcher class.  This class is responsible for executing all searches done against the index, and manages several caches.  There is typically  one Searcher per !SolrCore at any given time, and that searcher is used to execute all queries against that !SolrCore, but there may be additional Searchers open at a time during cache warming (in which and "old Searcher" is still serving live requests while a "new Searcher" is being warmed up).
   * '''''Shard''''': A distributed index is partitioned into "shards". Each shard corresponds to a Lucene instance and contains a disjoint subset of the documents in the index.