MKLUA variable

[Adam Hamsik <haaaad%gmail.com@localhost>]

Hi,

I think that with LUA import we should add mk variable to disable LUA from 
build. Because not everyone will want to install LUA on their systems(embedded 
devices e.g.), if we add other software which will depend on lua it should be 
conditionally compiled in with MKLUA, too. I was asked by Mark to discuss this 
issue on public mailing list first, so here is it [1].

[1] www.netbsd.org/~haad/mklua.diff

Regards

Adam.