Permit the first_data_timeout setting to be overridden in the DSL

lib/puma/dsl.rb

@@ -140,6 +140,12 @@ def persistent_timeout(seconds)
       @options[:persistent_timeout] = seconds
     end
 
+    # Define how long the tcp socket stays open, if no data has been received
+    #
+    def first_data_timeout(seconds)
+      @options[:first_data_timeout] = seconds
+    end
+
     # Work around leaky apps that leave garbage in Thread locals
     # across requests
     #

lib/puma/server.rb

@@ -64,12 +64,11 @@ def initialize(app, events=Events.stdio, options={})
       @thread_pool = nil
 
       @persistent_timeout = options.fetch(:persistent_timeout, PERSISTENT_TIMEOUT)
+      @first_data_timeout = options.fetch(:first_data_timeout, FIRST_DATA_TIMEOUT)
 
       @binder = Binder.new(events)
       @own_binder = true
 
-      @first_data_timeout = FIRST_DATA_TIMEOUT
-
       @leak_stack_on_error = true
 
       @options = options