separate fl and mlt.fl

library/Solarium/Client/RequestBuilder/MoreLikeThis.php

@@ -60,7 +60,7 @@ class Solarium_Client_RequestBuilder_MoreLikeThis extends Solarium_Client_Reques
         $request->addParam('q', $query->getQuery());
         $request->addParam('mlt.match.offset', $query->getStart());
         $request->addParam('rows', $query->getRows());
-        $request->addParam('mlt.fl', implode(',', $query->getFields()));
+        $request->addParam('fl', implode(',', $query->getFields()));
         $request->addParam('wt', 'json');
         $request->addParam('mlt.interestingTerms', $query->getInterestingTerms());
         $request->addParam('mlt.match.include', $query->getMatchInclude());

library/Solarium/Query/MoreLikeThis.php

@@ -84,7 +84,8 @@ class Solarium_Query_MoreLikeThis extends Solarium_Query
         'query'         => '*:*',
         'start'         => 0,
         'rows'          => 10,
-        'mlt.fl'        => '*,score',
+        'fl'            => '*,score',
+        'mlt.fl'        => 'text',
         'mlt.interestingTerms' => 'none',
         'mlt.match.include' => 'false',
     );