[libvirt] [PATCH] Make virsh support '~' and '$HOME' in interactive mode

[Daniel P. Berrange]

On Thu, Mar 21, 2013 at 05:00:58PM +0800, Zhang Xiaohe wrote:
> This patch makes '~' and '$HOME' can be recognized by virsh in
> interactive mode. These two variables are replaced with real
> path.

If we're going to the trouble of expanding $HOME, then we might
as well just make it expand arbitrary environment variables
rather than hardcoding $HOME.

Also, we'll need a way to escape the special meaning of '~'
and '$' to get them treated as literal characters instead of
special characters.

Daniel
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