ClassicPlus To Enable Classic Functions

A plug-in can enable all classic functions, and also contains some practical functions

1. Register hierarchical posts to build documents
2. Enable Link Manager
3. Enable Classic Editor
4. Enable Classic Widgets
5. Gravatar Mirror Server
6. In archive and home page display the post excerpt
7. Password protected posts only the content after <--more--> require password
8. Use vuejs and <div class="html-demo"></div> to preview html code
9. Img Src Prefix, like a CDN
10. Enable Login Limit
11. Enable SMTP Email
12. Highlight Style