Option to toggle CR/LF handing

I found while testing on Linux using Konversation and Netcat that having the line:

    @lt2_delimiter = "\r\n"

enabled would prevent the commands from being received by camper_van/EM.  
Commenting that line seems to "fix" the issue and I have not had any issues testing previously working clients like weechat.  So, I added an option to toggle the line based on a --crlf boolean flag.

Now that I look at it, maybe the default should be enabled?  I'm not sure if that was added to make Mac or Windoze clients work.