Import OSTYPE(freebsd6) support from sendmail open source repo for FreeBSD 6.0.
Import OSTYPE(freebsd6) support from sendmail open source repo for FreeBSD 6.0.

Approved by: re (scottl)
Requested by: keramida

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