sample config: document how to make CSPPlug send STS headers (off by default to allow for SSL debugging)

properly configure CORSPlug

See merge request pleroma/pleroma!440

hotfix: oauth: fix token decode regression

Closes #373

See merge request pleroma/pleroma!439

JSON-LD: object sanitization

See merge request pleroma/pleroma!438

Add ex_doc documentation to Pleroma

See merge request pleroma/pleroma!416

this causes JSON-LD parsers to get upset and has also lead to developer confusion from outside
projects which tried to parse our internal data.  accordingly, it seems better to just remove
it.

activitypub: object view: sanitize both the activity and the object when an activity is given for rendering

ostatus: only federate activities concerning note objects

See merge request !437

Host LitePub JSON-LD context locally

See merge request !435

Test that prismo url-map transforms into a string

See merge request !414