Now admins can choose a title for their About and Privacy pages; now
editable through the instance page editor.
This adds `title` and `content_type` fields to the `appcontent` table,
requiring a migration by running `writefreely --migrate`
The content_type field specifies that items we're currently storing in
this table are all "page"s; queries for fetching these have been updated
to filter for this type. In the future, this field will be used to
indicate when an item is a stylesheet (ref T563) or other supported
type.
Ref T566
This includes:
- A new `user_invites` config value that determines who can generate
invite links
- A new page for generating invite links, with new user navigation link
- A new /invite/ path that allows anyone to sign up via unique invite
link, even if registrations are closed
- Tracking who (of registered users) has been invited by whom
It requires an updated database with `writefreely --migrate` in order to
work.
This closes T556
Matt Baer