Revert "revert fix to check if the added integration test will fall"

This reverts commit ecafd3f3c3.

lib/puma/server.rb

@@ -79,7 +79,6 @@ module Puma
       @first_data_timeout = options.fetch(:first_data_timeout, FIRST_DATA_TIMEOUT)
 
       @binder = Binder.new(events)
-      @own_binder = true
 
       @leak_stack_on_error = true
 
@@ -102,7 +101,6 @@ module Puma
 
     def inherit_binder(bind)
       @binder = bind
-      @own_binder = false
     end
 
     def tcp_mode!
@@ -271,10 +269,6 @@ module Puma
         end
 
         @notify.close
-
-        if @status != :restart and @own_binder
-          @binder.close
-        end
       end
 
       @events.fire :state, :done
@@ -430,10 +424,6 @@ module Puma
       ensure
         @check.close
         @notify.close
-
-        if @status != :restart and @own_binder
-          @binder.close
-        end
       end
 
       @events.fire :state, :done
@@ -942,6 +932,10 @@ module Puma
         @events.debug "Drained #{count} additional connections."
       end
 
+      if @status != :restart
+        @binder.close
+      end
+
       if @thread_pool
         if timeout = @options[:force_shutdown_after]
           @thread_pool.shutdown timeout.to_i