View source for NPOTB

'''NPOTB''' is the acryonym of "Not Part Of The [[Build]]".

An NPOTB change to source code may not need as stringent review as code that is constantly and automatically built by the Mozilla.

NPOTB changes don't affect the [[Tinderbox]]es for the main platforms. 
For example changes in files that are only used by OS/2 or BeOS don't interfere with building for other platforms, hence should have zero risk for breaking them.