Documentation out of date?

Would love to know what these undocumented options do, and what happens when they're all set to defaults (false/0.0):

  "Enable Sending Message Per Update Rate": false,
  "Enable Sending Message On Player Leave/Join": false,
  "Enable Sending Server Loading Message": false,
  "Update Rate (Seconds)": 0.0,​

Also the default config now uses types of "Custom" and "Playing" but neither of these are listed under Valid Types in the documentation.