Icon request: webmention
Hello, it would be great if we can add an icon for [webmention](https://indieweb.org/Webmention)
## Icon

![360px-webmention-logo svg](https://user-images.githubusercontent.com/10530469/62764164-88d00500-ba8d-11e9-8632-5f749817aa8c.png)

also svg can be found here : https://indieweb.org/File:webmention-logo.svg

## Name Suggestion

fa-webmention

## Use Case

For sites/blogs that support webmention


