ENG-4215: Warning if NPD is disabled.
ENG-4215: Disabling second warning line.
Leaving it commented out with a comment explaining why in case we change our minds later (I don't usually do this).
ENG-4215: Fix stupid tabs.
Merge pull request #359 from VoltDB/release-2.8.4.2-merge4270

Merge partition detection disabled warning from 3.0 to 2.8.4.2.