[Solr Wiki] Update of "FunctionQuery" by BensonMargulies

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The "FunctionQuery" page has been changed by BensonMargulies:
http://wiki.apache.org/solr/FunctionQuery?action=diff&rev1=79&rev2=80

Comment:
clarify parser status for query function examples.

  
  == query ==
  <!> [[Solr1.4]] query(subquery, default) returns the score for the given subquery, or the default value for documents not matching the query.  Any type of subquery is supported through either parameter dereferencing {{{$otherparam}}} or direct specification of the query string in the LocalParams via "v".
+ 
+ These examples assume '&defType=func', since they just have a function in the Q parameter. 
  
   . Example Syntax: '''q=product(popularity, query({!dismax qf=text v='solr rocks'}))''' returns the product of the popularity and the score of the dismax query.
   . Example Syntax: '''q=product(popularity, query($qq))&qq={!dismax qf=text}solr rocks''' is equivalent to the previous query, using param dereferencing.