fixup! Use endpoint as default connection option (ADR-119)

Author: surminus

lib/ably/realtime/client.rb

@@ -14,8 +14,6 @@ class Client
       extend Forwardable
       using Ably::Util::AblyExtensions
 
-      DOMAIN = 'main.realtime.ably.net'
-
       # A {Aby::Realtime::Channels} object.
       #
       # @spec RTC3, RTS1

lib/ably/rest/client.rb

@@ -18,9 +18,6 @@ class Client
       extend Forwardable
       using Ably::Util::AblyExtensions
 
-      # Default Ably domain for REST
-      DOMAIN = 'main.realtime.ably.net'
-
       MAX_MESSAGE_SIZE = 65536 # See spec TO3l8
       MAX_FRAME_SIZE = 524288 # See spec TO3l8
 
@@ -221,12 +218,10 @@ def initialize(options)
           options_fallback_hosts
         when custom_host || options[:realtime_host] || custom_port || custom_tls_port
           []
-        when endpoint
-          if endpoint.start_with?('nonprod:')
-            CUSTOM_ENVIRONMENT_FALLBACKS_SUFFIXES.map { |host| "#{endpoint.gsub('nonprod:', '')}.#{host}" }
-          else
-            CUSTOM_ENVIRONMENT_FALLBACKS_SUFFIXES.map { |host| "#{endpoint}.#{host}" }
-          end
+        when endpoint.start_with?('nonprod:')
+          CUSTOM_ENVIRONMENT_FALLBACKS_SUFFIXES.map { |host| "#{endpoint.gsub('nonprod:', '')}.#{host}" }
+        when endpoint != 'main'
+          CUSTOM_ENVIRONMENT_FALLBACKS_SUFFIXES.map { |host| "#{endpoint}.#{host}" }
         else
           Ably::FALLBACK_HOSTS
         end