Description of problem:


Version-Release number of selected component (if applicable):
Problem started in 0.8.7

How reproducible:


Steps to Reproduce:
1. create a default network that contains some host entries for static dhcp
virsh -c qemu:///system net-edit default
<network>
  <name>default</name>
  <uuid>86ca83fc-ca15-4e4c-xxxx-xxxx3c0cxxxx</uuid>
  <forward mode='route'/>
  <bridge name='virbr0' stp='on' delay='0' />
  <ip address='10.10.122.1' netmask='255.255.255.0'>
    <dhcp>
      <host mac='52:54:00:01:13:11' name='backup' ip='10.10.122.11' />
      <host mac='52:54:00:23:12:25' name='vm20' ip='10.10.122.20' />
    </dhcp>
  </ip>
</network>

2. dnsmasq is automaticallly restarted (or restart libvirtd) and check with 
ps -elfa | grep dnsmasq
/usr/sbin/dnsmasq --strict-order --bind-interfaces --pid-file=/var/run/libvirt/network/default.pid --conf-file=  --listen-address 10.10.122.1 --except-interface lo --dhcp-range 10.10.122.1,static --dhcp-no-override

3. in py opinion, the --dhcp-hostfile /var/lib/libvirt/dnsmasq/default.hostsfile  option is missing in the dnsmasq option list. The file /var/lib/libvirt/dnsmasq/default.hostsfile is however correctly generated
  
Actual results:

ps -elfa | grep dnsmasq
/usr/sbin/dnsmasq --strict-order --bind-interfaces --pid-file=/var/run/libvirt/network/default.pid --conf-file=  --listen-address 10.10.122.1 --except-interface lo --dhcp-range 10.10.122.1,static --dhcp-no-override

Expected results:

/usr/sbin/dnsmasq --strict-order --bind-interfaces --pid-file=/var/run/libvirt/network/default.pid --conf-file=  --listen-address 10.10.122.1 --except-interface lo --dhcp-range 10.10.122.1,static --dhcp-no-override  --dhcp-hostfile /var/lib/libvirt/dnsmasq/default.hostsfile

Additional info:

Tested on Arch Linux