Description of problem:

When running network commands (eg. using
http://libguestfs.org/guestfs.3.html#guestfs_command ),
these can fail if they access a public service on the 10.x.x.x
network.  For example, if trying to run 'yum update' and if
yum has been configured to use a yum server or proxy which
is within the local network and therefore has a 10.x.x.x address.

This happens because inside the appliance we use qemu's
userspace network to talk from daemon to host library, and
qemu's userspace network by default is set to use the 10.x.x.x
address space for its own purposes.

Proposed solution is to switch to using link local addresses,
see: http://tools.ietf.org/html/rfc3927

Version-Release number of selected component (if applicable):

libguestfs 1.3.9

How reproducible:

Always.

Steps to Reproduce:
1. Run 'sh "yum -y update"'

Actual results:

Fails if the network command has to access any network
service which resolves to 10.x.x.x address.

Expected results:

Should not fail.

Additional info: