[Libguestfs] [PATCH] customize: Move virt-customize-related code to a separate

[Richard W.M. Jones]

There's not going to be an easy way to present this patch.  It's huge
and interconnected.

Anyway, what it does is lay the groundwork for a new tool which I'm
calling 'virt-customize'.  virt-customize is virt-builder, but without
the part where it downloads a template from a respository.  Just the
part where it customizes the template, that is, installing packages,
editing configuration files, setting a random seed and so on.

This patch splits the customize bits of virt-builder out into a
separate library (all the code under customize/).

Eventually this subdirectory will evolve into a virt-customize tool,
and virt-sysprep will also use the library.  But in the current patch
the library is only used in virt-builder.

Mostly this is painful code motion.

Rich.