[PATCH] Implement and use an xstrdup() function

[Jon Loeliger]

> 
> Fair enough.  Now that we have a util.c, we should move die() and
> xmalloc() in there as well which are currently duplicated between dtc
> and convert-dtsv0.

Agreed.  I'll get there if you don't beat me to it.

(I'm catching up here some...)

jdl