freebsd version numbers

[Wojciech Puchar]

> I upgraded to Freebsd systems from 7.0 to 7.2
> on the first one, done May 25th, I use the generic kernel
> $ uname -a reports: 7.2-RELEASE #0
>
> on the second one, done 3 days later (May 28th)
> on this system I also build and installed a custom kernel after upgrade.
> $ uname -a reports:  7.2-RELEASE #1


every time you do config and make depend;make it bumps that number by one