DragonFlyBSD

Hello,

I am attaching a patch for #2247.

Please take a look at:
http://bugs.dragonflybsd.org/issues/2447
and the attached patch.

The line int combine_cpus = (enable_ncpus == 0 && n_cpus > 1);
basically means: if "-M" is not being used and the computer has more than
one CPU.

Any feedback is more than welcome.

Regards

_
Javier