* REFACTOR: Rename SiteSetting.disable_edit_notifications to disable_system_edit_notifications
- The older name could cause some confusion because the setting does not disable all edit notifications, only system ones.
* FIX: Add frozen_string_literal: true in the migration
* DEV: Deprecate 'disable_edit_notifications'
This reduces chances of errors where consumers of strings mutate inputs
and reduces memory usage of the app.
Test suite passes now, but there may be some stuff left, so we will run
a few sites on a branch prior to merging
Migrates email user options to a new data structure, where `email_always`, `email_direct` and `email_private_messages` are replace by
* `email_messages_level`, with options: `always`, `only_when_away` and `never` (defaults to `always`)
* `email_level`, with options: `always`, `only_when_away` and `never` (defaults to `only_when_away`)
* IPB import script replace PHP code tags with proper markdown
remove excess newlines in code blocks
decode HTML entities in code blocks
add replacement for list items
proper handling of attachments that are not images
fix typo
improved quote handling
fix code style complaint from travis-ci build
Rishabh
Sam Saffron
Penar Musaraj
Carsten Brandt
Arpit Jalan
Neil Lalonde
Jay Pfaffman