Fix #329 - avatar errors no longer prevent remote accounts from being saved

(without avatar). Also improved search position of exact matches

app/services/unsubscribe_service.rb

@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+class UnsubscribeService < BaseService
+  def call(account)
+    subscription = account.subscription(api_subscription_url(account.id))
+    response = subscription.unsubscribe
+
+    unless response.successful?
+      Rails.logger.debug "PuSH unsubscribe for #{account.acct} failed: #{response.message}"
+    end
+
+    account.secret = ''
+    account.subscription_expires_at = nil
+    account.save!
+  rescue HTTP::Error, OpenSSL::SSL::SSLError
+    Rails.logger.debug "PuSH subscription request for #{account.acct} could not be made due to HTTP or SSL error"
+  end
+end