Refactor overboard catalog support to be slightly less bad

inc/mod/pages.php

@@ -768,20 +768,17 @@ function mod_view_catalog($boardName) {
         echo $catalog->build($boardName, true);
     }
     // What follows if horrendous. I am ashamed of myself. See https://git.leftypol.org/leftypol/leftypol/issues/94
-    elseif ($boardName === 'overboard' || $boardName === 'sfw' || $boardName === 'alt') {
+    else {
         require "templates/themes/overboards/overboards.php";
-
-        $settings = array_merge($settings, themeSettings('catalog'));
-
         foreach ($overboards_config as &$overboard) {
             if ($overboard['uri'] === $boardName) {
+                $settings = array_merge($settings, themeSettings('catalog'));
+
                 $included_boards = array_diff(listBoards(true), $overboard['exclude']);
                 echo $catalog->buildOverboard($overboard['uri'], $settings, $included_boards, true);
                 break;
             }
         }
-    } else {
-        error("Unknown board");
     }
 }