is_charged_transaction: refunded is still charged.
Allow subtracting subreddits from /r/mod.
AllMinus/ModMinus: Handle case where base_sr doesn't exist.
Link._by_url: always return a list.
hot_links_by_url_listing: Return a listing of links for a given url.
VUrl: Don't check for already submitted url.
Delete link_from_url and filter_links.
Only demangle_url if there is a url.
Ignore case when building list of subreddits with saved things.
Make all moderators have a modmsgtime attribute.

This attribute can serve as a handy indicator that a user is a moderator
somewhere and can therefore replace the more costly modship lookup in
reddit_base.
CachedResults: never skip inserting an item if it's already stored.
Make hot score continuous.
Delete FixListing.

Not needed since cached queries are always used.
Show sponsored headlines on all link listings.
Suppress numbering on promoted links.
Improve handling of changes to finished promoted links.
Fix path for ModMinus.
Add username display to the reset password form.
Don't log in / log out in the password reset flow.

This prevents using valid password reset tokens to force a logout CSRF,
as reported by Mathias Karlsson.
Don't log users out in the verify email flow.

Fixes logout CSRF reported by Mathias Karlsson.