Resolving VUFIND-562

(Facet names with quotes or back slashes do not return results)

module/VuFind/src/VuFind/Search/Solr/Params.php

@@ -102,7 +102,7 @@ class Params extends \VuFind\Search\Base\Params
                 ) {
                     $filterQuery[] = $field.':'.$value;
                 } else {
-                    $filterQuery[] = $field.':"'.$value.'"';
+                    $filterQuery[] = $field.':"'.addcslashes($value, '"\\').'"';
                 }
             }
         }