Merge "RCFilters: Live update: no data returns 204"

diff --combined includes/specialpage/ChangesListSpecialPage.php
index 6114b31,43012af..ec09559
--- 1/includes/specialpage/ChangesListSpecialPage.php
--- 2/includes/specialpage/ChangesListSpecialPage.php
+++ b/includes/specialpage/ChangesListSpecialPage.php
@@@ -533,7 -533,7 +533,7 @@@ abstract class ChangesListSpecialPage e
                // Used by "live update" and "view newest" to check
                // if there's new changes with minimal data transfer
                if ( $this->getRequest()->getBool( 'peek' ) ) {
-                       $code = $rows->numRows() > 0 ? 200 : 304;
+                       $code = $rows->numRows() > 0 ? 200 : 204;
                        $this->getOutput()->setStatusCode( $code );
                        return;
                }
@@@ -602,6 -602,10 +602,6 @@@
                                'wgStructuredChangeFiltersEnableExperimentalViews',
                                $experimentalStructuredChangeFilters
                        );
 -                      $out->addJsConfigVars(
 -                              'wgStructuredChangeFiltersEnableLiveUpdate',
 -                              $this->getConfig()->get( 'StructuredChangeFiltersEnableLiveUpdate' )
 -                      );
                        $out->addJsConfigVars(
                                'wgRCFiltersChangeTags',
                                $this->buildChangeTagList()