Support SSH shell/exec channel request output

Looks like channel[:data] was initialized but never used.

Author: wvu

lib/net/ssh/command_stream.rb

@@ -21,6 +21,7 @@ def shell_requested(channel, success)
     end
 
     channel[:data] = ''
+    channel[:extended_data] = ''
 
     channel.on_eof do
       cleanup
@@ -32,10 +33,12 @@ def shell_requested(channel, success)
 
     channel.on_data do |ch, data|
       self.rsock.write(data)
+      channel[:data] << data
     end
 
     channel.on_extended_data do |ch, ctype, data|
       self.rsock.write(data)
+      channel[:extended_data] << data
     end
 
     self.channel = channel