Merge commit '1e3b19230a48174acf524cf1a9f5a498e220ea7d' into glitch-soc/merge-upstream

Conflicts:
- `app/models/account.rb`:
  Upstream added new validations close to lines on which glitch-soc had
  modified validations to handle custom limits set through environment
  variables.
  Ported upstream changes.
- `config/initializers/content_security_policy.rb`:
  Upstream added `AZURE_ALIAS_HOST`. Glitch-soc's version of the file is
  completely different.
  Added `AZURE_ALIAS_HOST` to our version of the file.

app/models/account.rb

@@ -93,12 +93,19 @@ class Account < ApplicationRecord
   # Remote user validations, also applies to internal actors
   validates :username, format: { with: USERNAME_ONLY_RE }, if: -> { (!local? || actor_type == 'Application') && will_save_change_to_username? }
 
+  # Remote user validations
+  validates :uri, presence: true, unless: :local?, on: :create
+
   # Local user validations
   validates :username, format: { with: /\A[a-z0-9_]+\z/i }, length: { maximum: 30 }, if: -> { local? && will_save_change_to_username? && actor_type != 'Application' }
   validates_with UnreservedUsernameValidator, if: -> { local? && will_save_change_to_username? && actor_type != 'Application' }
   validates :display_name, length: { maximum: MAX_DISPLAY_NAME_LENGTH }, if: -> { local? && will_save_change_to_display_name? }
   validates :note, note_length: { maximum: MAX_NOTE_LENGTH }, if: -> { local? && will_save_change_to_note? }
   validates :fields, length: { maximum: DEFAULT_FIELDS_SIZE }, if: -> { local? && will_save_change_to_fields? }
+  validates :uri, absence: true, if: :local?, on: :create
+  validates :inbox_url, absence: true, if: :local?, on: :create
+  validates :shared_inbox_url, absence: true, if: :local?, on: :create
+  validates :followers_url, absence: true, if: :local?, on: :create
 
   scope :remote, -> { where.not(domain: nil) }
   scope :local, -> { where(domain: nil) }