Description of problem: Changes to
/usr/lib/python2.4/site-packages/virtinst/XenGuest.py have changed the behavior
of virt-install in a way that I find irritating.  Our Xen guests have a hyphen
in their names, but virt-install rejects any name that has a hyphen in it now. 
It was not this way in python-virtinst-0.95.0-1.fc6 , but it is so in
python-virtinst-0.98.0-1.fc6 .  I traced the error back to this chunk of
/usr/lib/python2.4/site-packages/virtinst/XenGuest.py : 

    def set_name(self, val):
        # FIXME: need some validation here
        if re.match("^[a-zA-Z0-9_]*$", val) == None:
            raise ValueError, "Domain name must be alphanumeric or _"

This is unfortunate, because this new code restricts virtual machine names to
alphanumeric characters and the underscore.  Now, a hyphen is a valid character
in a DNS A record (while an underscore character is not).  I like my Xen guest
OS domain names to match their DNS names for obvious reasons.  XenGuest.py
should allow any characters allowed in DNS names as a minimum.  

Version-Release number of selected component (if applicable):
python-virtinst-0.98.0-1.fc6


How reproducible: Try supplying a hyphenated name to virt-install, either on the
command line with the -n argument, or manually when virt-install prompts for a
name.  It will reject any name with a hyphen in it.  

Steps to Reproduce:
1. virt-install -n host-name


Actual results: ERROR:  Domain name must be alphanumeric or _


Expected results: Completed virt-install with no errors 


Additional info: There is a workaround: I created the virtual machine with an
underscore in the name instead of a hyphen.  After the virt-install process and
Kickstart were finished, I renamed the /etc/xen/host_name file to
/etc/xen/host-name.  Then I started the virtual machine and it is fine.