safelist/blocklist is for the Beta gem. Restore whitelist/blacklist

config/initializers/rack_attack.rb.example

@@ -26,12 +26,12 @@ whitelist = Gitlab.config.rack_attack['whitelist']
 blacklist = Gitlab.config.rack_attack['blacklist'] unless Gitlab.config.rack_attack['blacklist'].nil?
 
 unless Rails.env.test? || !rack_attack_enabled
-  Rack::Attack.safelist('allow custom whitelist') do |req|
+  Rack::Attack.whitelist('allow custom whitelist') do |req|
     whitelist.include? req.ip  
   end
 
   unless blacklist.nil?
-    Rack::Attack.blocklist('ban custom blacklist') do |req|
+    Rack::Attack.blacklist('ban custom blacklist') do |req|
       blacklist.include? req.ip
     end
   end

config/initializers/rack_attack_git_basic_auth.rb

@@ -3,8 +3,8 @@ git_basic_auth_enabled = Gitlab.config.rack_attack.git_basic_auth['enabled']
 
 unless Rails.env.test? || !rack_attack_enabled || !git_basic_auth_enabled
   # Tell the Rack::Attack Rack middleware to maintain an IP blocklist. We will
-  # update the blocklist from GitLab::Auth.rate_limit
-  Rack::Attack.blocklist('Git HTTP Basic Auth') do |req|
+  # update the blacklist from GitLab::Auth.rate_limit
+  Rack::Attack.blacklist('Git HTTP Basic Auth') do |req|
     Rack::Attack::Allow2Ban.filter(req.ip, Gitlab.config.rack_attack.git_basic_auth) do
       # This block only gets run if the IP was not already banned.
       # Return false, meaning that we do not see anything wrong with the