Issue title: Add Friendica Thumbnail
 Issue body: Hi all,

Please add the Friendica Thumbnail, since 2FA is now enabled.

You can find the SVG here:
https://github.com/friendica/docker/blob/master/friendica.svg

Thank you :-)
 Comments: 
 Comment 0: @flocke: Was included with 0.7.0 and can be closed.
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