What do each of the debug options do in VPN menu?

Below is a summary of the settings, see http://www.die.net/doc/linux/man/man8/ipsec_pluto.8.html for more information.

• crypt
  show the encryption and decryption of messages
• parsing
  show the structure of input messages
• emitting
  show the structure of output messages
• control
  show pluto’s decision making
• klips
  show pluto’s interaction with KLIPS
• dns
  show pluto’s interaction with DNS for KEY and TXT records