Refactor to use a recursive CTE to calculate implied tags in SQL, rather
than storing them in a descendant_names field. This avoids the
complexity of keeping the stored field up to date. It's also more
flexible, since it allows us to find both descendant tags (tags that
imply a given tag) as well as ancestor tags (tags that are implied by a
given tag).
The twitter gem had several problems:
* It's been unmaintained for over a year.
* It pulled in a lot of dependencies, many of which were outdated. In
particular, it locked the `http` gem to version 3.3, preventing us
from upgrading to 4.2.
* It raised exceptions on normal error conditions, like for deleted
tweets or suspended users, which we really don't want.
* We had to wrap it to provide caching.
Changes:
* Fixes#4226 (Exception when creating new artists entries for suspended
Twitter accounts)
* Drop support for scraping images from summary cards. Summary cards
are the previews you get when you link to a website in a tweet. These
preview images aren't always the best image.
Add a new IP address search page at /ip_addresses. Replaces the old
search page at /moderator/ip_addrs.
On user profile pages, show the user's last known IP to mods. Also add
search links for finding other IPs or accounts associated with the user.
IP address search uses a big UNION ALL statement to merge IP addresses
across various tables into a single view. This makes searching easier,
but is known to timeout in certain cases.
Fixes#4207 (the new IP search page supports searching by subnet).
This gem uses a native extension that requires a C++ compiler to build.
Removing this gem removes the need to have a C++ toolchain to install Danbooru.
DText was changed so that the .dtext-external-link class is now applied to all external links.
Previously it applied only to named links (ex: "google":[http://www.google.com]), not bare
links (ex: http://www.google.com).
Fixes issue with newrelic failing to set up rake instrumentation:
ERROR : Error while detecting rake_instrumentation:
ERROR : NameError: uninitialized constant Rake::VERSION
