Enable Previous FreeBSD Binary Compatibility Emulation

# FreeBSD 3x Binary Compatibility
cd /usr/ports/misc/compat3x
make install clean

# FreeBSD 4x Binary Compatibility
cd /usr/ports/misc/compat4x
make install clean

# FreeBSD 5x Binary Compatibility
cd /usr/ports/misc/compat5x
make install clean

# FreeBSD 6x Binary Compatibility
cd /usr/ports/misc/compat6x
make install clean