[toplevel patch] Up with parallelism!

[DJ Delorie]

> Hmm...  I'd be a bit more conservative, and keep the ability to ensure
> serial-configure, for those who feel the need for it.  How about just
> disabling it by default for now, and see whether anyone runs into a
> problem?  We can always remove it later.

They can just use "-j1" for that.

I think this replicates the old functionality:

$ make -j1 MAKE="make -j3"