#Releasev2.9.0: Telegraph-related revert, skip cert verification, and more

BREAKING CHANGES
Media (image and video) are no longer uploaded when generating Telegraph posts due to Telegraph disabling media upload. (first introduced in v2.6.0)
Addition
● Disable TLS certificate verification: The environment variable VERIFY_TLS has been added to disable (when set to 0) or enable (when set to 1, default) TLS certificate verification. This is useful when subscribing to feeds with their TLS misconfigured. Note: Disabling TLS certificate verification is not recommended and should only be used as a last resort.
Enhancements
● Sanitize post title and author: The title and author of a post (RSS item or Atom entry) are now sanitized to prevent unexpected formatting issues. In particular, unexpected whitespaces and linebreaks are removed, and any HTML elements are stripped. This helps display them correctly in Telegram messages as well as Telegraph posts.
● Improve robustness on Railway.app: Some Railway-specific environment variables are recognized to improve robustness on Railway.app. In particular, DATABASE_PRIVATE_URL and DATABASE_PUBLIC_URL will be used when DATABASE_URL is unavailable or invalid. This should solve most database connection issues on Railway.app.
● Minor refactor: Some internal functions have been refactored to improve readability and maintainability.

Bug fixes
● /version not working: When installed from PyPI (e.g. pip install rsstt), the /version command might cause an error. This was a regression introduced in v2.7.0.
● Bot managers can set monitoring intervals shorter than limit: Due to the breaking change introduced in v2.8.0, the privilege of bot managers to set intervals shorter than the minimal monitoring interval became useless. While v2.8.0 only applied this limitation when monitoring the updates of feeds, this release also applies it to the attempts by bot managers to change the monitoring interval for a subscription. Note: bot managers can always lower the minimal monitoring interval by adjusting minimal_interval in /set_option (see also Advanced Settings), but doing so will also permit anyone who is able to use the bot to set shorter intervals.
● Minor bug fixes

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#Releasev2.9.0: 与 Telegraph 相关的 revert、跳过证书校验和更多

重大变更
由于 Telegraph 禁用了媒体上传，生成 Telegraph 文章时不再上传媒体 (图片与视频) 。(在 v2.6.0 中首次引入)

新增功能
● 关闭 TLS 证书验证: 环境变量 VERIFY_TLS 已被添加以禁用 (设置为 0 时) 或启用 (设置为 1 时，默认) TLS 证书验证。当订阅 TLS 被错误配置的 feed 时，这很有用。注意：不建议禁用 TLS 证书验证，只应用作最后手段。

增强
● 净化文章标题和作者: 文章 (RSS item 或 Atom entry) 的标题和作者现在被净化以防止意外的格式问题。特别是，预期外的空格和换行符被移除，任何 HTML 元素都被剥离。这有助于在 Telegram 消息以及 Telegraph 文章中正确显示它们。
● 改善在 Railway.app 上的稳健性: 一些特定于 Railway 的环境变量被识别以提高在 Railway.app 上的稳健性。特别是，当 DATABASE_URL 不可用或无效时，将使用 DATABASE_PRIVATE_URL 和 DATABASE_PUBLIC_URL。这应该解决在 Railway.app 上的大多数数据库连接问题。
● 次要的重构: 重构了一些内部函数以提高可读性和可维护性。

Bug 修复
● /version 不工作: 当从 PyPI 安装时 (例如 pip install rsstt), /version 命令可能会导致错误。这是在 v2.7.0 中引入的一个回归 (regression)。
● Bot 管理员可以设置比限制更短的监控间隔: 由于 v2.8.0 中引入的一个重大变更，bot 管理员可以设置比最小监控间隔更短的间隔的特权变得毫无意义。虽然 v2.8.0 只在监控 feed 的更新时应用了这个限制，但这个版本也将它应用于 bot 管理员的更改订阅监控间隔的尝试。注意: bot 管理员总是可以通过调整 /set_option 中的 minimal_interval 来降低最小监控间隔 (另请参阅 高级设置)，但这样做也会允许任何能够使用 bot 的人设置更短的间隔。
● 次要的 bug 修复

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