Remove 'dangerous' instructions from the example make.conf. Clarify when and why these might be used and that this isn't a supported configuration.
Remove 'dangerous' instructions from the example make.conf.
Clarify when and why these might be used and that this isn't a supported
configuration.

PR:		docs/144488
Submitted by:	amdmi3
Approved by:	cperciva (implicit)
MFC after:	2 weeks

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase