fix requires so docs can build

lib/logstash/filters/xml.rb

@@ -1,6 +1,5 @@
 require "logstash/filters/base"
 require "logstash/namespace"
-require "xmlsimple"
 require "rexml/document"
 include REXML
 
@@ -44,6 +43,7 @@ class LogStash::Filters::Xml < LogStash::Filters::Base
 
   public
   def register
+    require "xmlsimple"
     @xml = {}
 
     @config.each do |field, dest|

lib/logstash/inputs/irc.rb

@@ -1,7 +1,7 @@
 require "logstash/inputs/base"
 require "logstash/namespace"
 require "thread"
-require "cinch"
+
 # Read events from an IRC Server.
 #
 class LogStash::Inputs::Irc < LogStash::Inputs::Base
@@ -37,6 +37,7 @@ class LogStash::Inputs::Irc < LogStash::Inputs::Base
 
   public
   def register
+    require "cinch"
     @irc_queue = Queue.new
     @logger.info("Connecting to irc server", :host => @host, :port => @port, :nick => @nick, :channels => @channels)
 

lib/logstash/outputs/irc.rb

@@ -1,7 +1,6 @@
 require "logstash/outputs/base"
 require "logstash/namespace"
 require "thread"
-require "cinch"
 
 # Write events to IRC
 #
@@ -33,6 +32,7 @@ class LogStash::Outputs::Irc < LogStash::Outputs::Base
 
   public
   def register
+    require "cinch"
     @irc_queue = Queue.new
     @logger.info("Connecting to irc server", :host => @host, :port => @port, :nick => @nick, :channels => @channels)
 

lib/logstash/outputs/pipe.rb

@@ -120,6 +120,7 @@ class PipeWrapper
 
   def puts(txt)
     @pipe.puts(txt)
+    @pipe.flush
     @active = true
   end