Unfortunately, clang gives warnings about sendmail code that cannot be turned off yet.  Since this is contrib code, and we don't really care about the warnings, just turn make them non-fatal for now.
Unfortunately, clang gives warnings about sendmail code that cannot be
turned off yet.  Since this is contrib code, and we don't really care
about the warnings, just turn make them non-fatal for now.

MFC after:	1 week

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