[Feature] Add Support for Pleroma

[ghbjklhv]

Feature: Add Support for Pleroma. What is Pleroma?: Pleroma is a free software Mastadon compatible social network.

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[cutls]

Please note more concretely.
example: "When deleting post, it works on Mastodon, but Pleroma gives error."
Pleroma says it has compatible with Mastodon.

[zergling-man]

Pleroma accounts don't receive notifications; and the notification log is always empty. I'm pretty sure I've mentioned this before, and it got fixed then, and then broke again a little while after. Though I only have one Pleroma account so maybe it's specific to that instance (freespeechextremist.com).