New build system

[Alan DeKok]

Arran Cudbard-Bell wrote:
> We need to pick this up again. I added .mk files for every module in the server, but other virtual targets still need converting.

  The makefile in raddb/ needs to be fixed.

> We should do it before 3.0 gets released.

  Yes.  That's a hard requirement.  And the issue Alan B keeps going on
about.

  I'd like to release 3.0 mid to late April.  We should do 2 beta
releases before that.

  Alan DeKok.