Merge branch 'master' into glitch-soc/merge-upstream

Conflicts:
- `app/services/resolve_url_service.rb`:
  The private toot search by URL hack has been revamped upstream.
  Took upstream's version.

lib/mastodon/accounts_cli.rb

@@ -236,6 +236,25 @@ module Mastodon
       say('OK', :green)
     end
 
+    desc 'fix-duplicates', 'Find duplicate remote accounts and merge them'
+    option :dry_run, type: :boolean
+    long_desc <<-LONG_DESC
+      Merge known remote accounts sharing an ActivityPub actor identifier.
+
+      Such duplicates can occur when a remote server admin misconfigures their
+      domain configuration.
+    LONG_DESC
+    def fix_duplicates
+      Account.remote.select(:uri, 'count(*)').group(:uri).having('count(*) > 1').pluck_each(:uri) do |uri|
+        say("Duplicates found for #{uri}")
+        begin
+          ActivityPub::FetchRemotAccountService.new.call(uri) unless options[:dry_run]
+        rescue => e
+          say("Error processing #{uri}: #{e}", :red)
+        end
+      end
+    end
+
     desc 'backup USERNAME', 'Request a backup for a user'
     long_desc <<-LONG_DESC
       Request a new backup for an account with a given USERNAME.

lib/mastodon/maintenance_cli.rb

@@ -14,7 +14,7 @@ module Mastodon
     end
 
     MIN_SUPPORTED_VERSION = 2019_10_01_213028
-    MAX_SUPPORTED_VERSION = 2020_12_06_004238
+    MAX_SUPPORTED_VERSION = 2020_12_18_054746
 
     # Stubs to enjoy ActiveRecord queries while not depending on a particular
     # version of the code/database

lib/mastodon/version.rb

@@ -17,7 +17,7 @@ module Mastodon
     end
 
     def flags
-      'rc1'
+      'rc2'
     end
 
     def suffix