Change config webfinger/http_alias to fix/legacy_http

Set $config['fix']['legacy_http'] to perform some actions that are
needed if your site used to be served over http but now has upgraded
to https!

plugins/WebFinger/lib/webfingerresource.php

@@ -37,7 +37,7 @@ abstract class WebFingerResource
         // (because remote sites look for it) verify that they are still
         // the same identity as they were on HTTP. Should NOT be used if
         // you've run HTTPS all the time!
-        if (common_config('webfinger', 'http_alias')) {
+        if (common_config('fix', 'legacy_http')) {
             foreach ($aliases as $alias=>$id) {
                 if (!strtolower(parse_url($alias, PHP_URL_SCHEME)) === 'https') {
                     continue;