Use bzip2(1) by default to compress package tarball on __FreeBSD_version >= 500039.
Use bzip2(1) by default to compress package tarball on
__FreeBSD_version >= 500039.

Submitted by:	Alex Lyashkov <umka@sevcity.net>
MFC after:	5 days

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