Don't show deprecated tags in the related tags or translated tags lists
when editing a post. It doesn't make sense to recommended adding tags
that can't be added to the post.
* Deprecated tags can't be added to posts, but existing deprecated tags
in a post won't be removed
* Only empty tags can be marked as deprecated manually
* No tags can be manually undeprecated
** These limits don't apply to admins
* Deprecating or undeprecating a tag will create a new mod action to
prevent people from going rogue
* Added deprecate/undeprecate commands for BURs
* Deprecating a tag via BUR removes all implications to and from it as well
This is necessary for the `commentary:` metatag, which has different
behavior depending on whether the metatag value is quoted. For example,
`commentary:translated` finds translated commentaries, while
`commentary:"translated"` finds commentaries containing the literal word
"translated".
Count the number of commented and noted posts directly, instead of
indirectly by counting the number of posts in a `commenter:<name>` or
`noteupdater:<name>` search. This is faster because it generates
better SQL.
Refactor the `PostQuery::AST#simplify` method to split it into three
methods: `#trim` to eliminate redundant AND and OR clauses, `#simplify`
to expand deeply nested subexpressions, and `#sort` to sort the query
into alphabetical order.
This is so we can normalize queries written by users by parsing and
rewriting them, but without expanding out nested subexpressions, which
can substantially alter the way the query is written.
Fix artist URLs still showing old cached site icons because the URL
didn't change when the file was updated. Use `image_pack_tag` so that
the filename includes the hash, so that the URL changes when the file
changes.
Stop the last remaining uses of the `artist_urls.normalized_url` column.
It's already no longer used by the artist finder. The only remaining
uses were by API users. Those users should use the `url` column instead.
Sometimes when a Newgrounds post is part of a set, there is a list of
links to other posts in the set in the artist's commentary. Exclude
these links because they're not really part of the commentary.
Example: https://www.newgrounds.com/art/view/boxofwant/annie-hughes-1 (NSFW)
Fix searches like this:
https://danbooru.donmai.us/artist_urls?search[url_not_regex]=https://www/.artstation/.com/[a-zA-Z0-9-.]
returning a HTTP 500 error with a blank page.
Here the problem is that Postgres raises an error because `[a-zA-Z0-9-.]`
is an invalid character class (it should be `[a-ZA-Z0-9.-]`). This error
happens on the error page itself, when rendering the <link rel="next"> /
<link rel="prev"> links in the <head>, so it causes the error page to fail.
