Add: #559 公開投稿を禁止する管理者設定 (#564)

config/locales/simple_form.en.yml

@@ -101,6 +101,7 @@ en:
         custom_css: You can apply custom styles on the web version of Mastodon.
         enable_local_timeline: While enabling this feature will allow for interaction between like-minded users, it may also strengthen the internal atmosphere; since Mastodon is supposed to have a local timeline, we recommend annotating it in the server introduction if it is to be disabled.
         enable_public_unlisted_visibility: If true, your community maybe closed-minded. If turn it false, strongly recommend that you disclose that you have disabled this setting!
+        enable_public_visibility: If disabled, public submissions will be forcibly replaced with "Public unlisted" or "Unlisted" submissions.
         mascot: Overrides the illustration in the advanced web interface.
         media_cache_retention_period: Downloaded media files will be deleted after the specified number of days when set to a positive value, and re-downloaded on demand.
         peers_api_enabled: A list of domain names this server has encountered in the fediverse. No data is included here about whether you federate with a given server, just that your server knows about it. This is used by services that collect statistics on federation in a general sense.
@@ -349,6 +350,7 @@ en:
         enable_emoji_reaction: Enable emoji reaction function
         enable_local_timeline: Enable local timeline
         enable_public_unlisted_visibility: Enable public-unlisted visibility / public-unlisted searchability
+        enable_public_visibility: Enable public visibility
         mascot: Custom mascot (legacy)
         media_cache_retention_period: Media cache retention period
         peers_api_enabled: Publish list of discovered servers in the API