Merge branch 'fix/2498-expires_in-scheduled-posts' into 'develop'

expires_in in scheduled status params

Closes #2498

See merge request pleroma/pleroma!3315

diff --combined docs/development/API/differences_in_mastoapi_responses.md
index c8905ea11a92c87f8bcdbe85b98df37554ae53c8,6288ad33dd06bf5ebc30c87327c3313be689f555..5f694602277c285d0f15e0fbcdff3961a178232b
--- 1/docs/development/API/differences_in_mastoapi_responses.md
--- 2/docs/development/API/differences_in_mastoapi_responses.md
+++ b/docs/development/API/differences_in_mastoapi_responses.md
@@@ -39,6 -39,12 +39,12 @@@ Has these additional fields under the `
  - `emoji_reactions`: A list with emoji / reaction maps. The format is `{name: "☕", count: 1, me: true}`. Contains no information about the reacting users, for that use the `/statuses/:id/reactions` endpoint.
  - `parent_visible`: If the parent of this post is visible to the user or not.
  
+ ## Scheduled statuses
+ 
+ Has these additional fields in `params`:
+ 
+ - `expires_in`: the number of seconds the posted activity should expire in.
+ 
  ## Media Attachments
  
  Has these additional fields under the `pleroma` object:
@@@ -92,7 -98,7 +98,7 @@@ Has these additional fields under the `
  - `hide_followers_count`: boolean, true when the user has follower stat hiding enabled
  - `hide_follows_count`: boolean, true when the user has follow stat hiding enabled
  - `settings_store`: A generic map of settings for frontends. Opaque to the backend. Only returned in `/api/v1/accounts/verify_credentials` and `/api/v1/accounts/update_credentials`
 -- `chat_token`: The token needed for Pleroma chat. Only returned in `/api/v1/accounts/verify_credentials`
 +- `chat_token`: The token needed for Pleroma shoutbox. Only returned in `/api/v1/accounts/verify_credentials`
  - `deactivated`: boolean, true when the user is deactivated
  - `allow_following_move`: boolean, true when the user allows automatically follow moved following accounts
  - `unread_conversation_count`: The count of unread conversations. Only returned to the account owner.