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[libvirt] 3 patches to solve bug 524280

  Basically dnsmasq limits itself by default to 150 leases maximum.
Which means we may inflict an arbitrary limit in the number of domains
running on a given host

The patches do 3 things:
  - first introduce IPv4 and IPv6 parsing routines, generally useful
    this could be used to double check input in other places too
  - then when a DHCP range is defined use those routines to parse
    the start and end, do some cheking and keep the range size in the
  - last when exec'ing dnsmasq compute the sum of all dhcp ranges
    and pass the max lease option


Daniel Veillard      | libxml Gnome XML XSLT toolkit  http://xmlsoft.org/
daniel veillard com  | Rpmfind RPM search engine http://rpmfind.net/
http://veillard.com/ | virtualization library  http://libvirt.org/

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