Merge branch 'feature/confirm-user-acc-resend-confirmation' into 'develop'

AdminAPI: Confirm user account, resend confirmation email

See merge request pleroma/pleroma!1994

diff --cc CHANGELOG.md
Simple merge

diff --cc docs/API/admin_api.md
Simple merge

diff --cc lib/pleroma/user.ex
Simple merge

diff --cc lib/pleroma/web/router.ex
Simple merge